# Recent questions tagged speed-time-distance

1 vote
1
Budhan covers a distance of $19$ km in $2$ hours by cycling one fourth of the time and walking the rest. The next day he cycles (at the same speed as before) for half the time and walks the rest (at the same speed as before) and covers $26$ km in $2$ hours. The speed in km/h at which Budhan walk is $1$ $4$ $5$ $6$
1 vote
2
Two trains started at $7$AM from the same point. The first train travelled north at a speed of $80$km/h and the second train travelled south at a speed of $100$km/h. The time at which they were $540$ km apart is ________ AM. $9$ $10$ $11$ $11.30$
3
Two cars at the same time from the same location and go in the same direction. The speed of the first car is $50$ km/h and the speed of the second car is $60$ km/h. The number of hours it takes for the distance between the two cars to be $20$ km is _____. $1$ $2$ $3$ $6$
4
A ball thrown upward satisfy the equation s=160 t - 20 t^2, where S is in m (meter) and t is in sec. what is the maximum height achieved by the ball ? (a) 80 (b) 160 (c) 240 (d) 320 According to me.. Here s=height reached by the ball. t=time taken by ... height the stone will have a velocity of zero (since it will stop at the highest point). So, v=0 than can anyone tell me where I am wrong ?
5
The speed of a bus during the second hour of the journey is twice that in the first hour. Also, its speed in the third hour is two-third the sum of its speeds in the first two hours. Had the bus travelled for three hours at the speed of the first hour, it would have travelled ... speed of the bus for the first three hours. $100 \text{kmph}$ $80 \text{kmph}$ $70 \text{kmph}$ $60 \text{kmph}$
6
Without stoppages a train travels a certain distance with an average speed of $80 \hspace {0.1cm} km/hr$ and with stoppages with an average speed of $60 \hspace {0.1cm} km/hr$. How many minutes per hour does the train stops? HOW TO DO CONVENTIONALLY WITHOUT USING DIRECT FORMULA AND SHORTCUT?
1 vote
7
Two trains separated by $480 \hspace{0.1cm}km$ are approaching each other with speed $70\hspace{0.1cm}kmph$ and $50\hspace{0.1cm}kmph$ respectively. A bird with speed $100\hspace{0.1cm} km/hr$ started from the front of first train goes to the front of second train and comes ... distance covered by the bird!? $500\hspace{0.1cm}km$ $400\hspace{0.1cm}km$ $480\hspace{0.1cm}km$ $600\hspace{0.1cm}km$
1 vote
8
If $A$ and $B$ run at $6km/hr$ and $12 km/hr$ on a circular track $6 km$ long.When will they meet for the first time if they are running in opposite direction?
1 vote
9
In a $200m$ race, $A$ beats $B$ by $20m$.$B$ beates $C$ by $10m$ in a $250m$ race.By how many meters will $A$ beat $C$ in a $1 km$ race?
10
An automobile travels from city $A$ to city $B$ and returns to city $A$ by the same route. The speed of the vehicle during the onward and return journeys were constant at $60km/h$ and $90 km/h$, respectively. What is the average speed in $km/h$ for the entire journey? $72\hspace{0.2cm} km/h$ $73\hspace{0.2cm} km/h$ $74\hspace{0.2cm} km/h$ $75 \hspace{0.2cm}km/h$
11
Two trains start at the same time from Mumbai and Pune and proceed towards each other at the rate of $60\hspace{0.1cm} km$ and $40\hspace{0.1cm}km$ $\text{per hour}$ respectively. When they meet, it is found that one train has travelled $20\hspace{0.1cm} km$ more than the other. Find the distance between Mumbai and Pune.
1 vote
12
From the time the front of a train enters a platform, it takes $25$ seconds for the back of the train to leave the platform, while traveling at a constant speed of $54$ km/h. At the same speed, it takes $14$ seconds to pass a man running at $9$ km/h in the same direction as ... and that of the platform in meters, respectively? $210$ and $140$ $162.5$ and $187.5$ $245$ and $130$ $175$ and $200$
13
A beats B in a Kilometer race by 50s and C by 450m. If B and C run a Kilometer race, B wins by 40s. How much time does C take to run a Kilometer?
14
Trucks ($10$ m long) and cars ($5$ m long) go on a single lane bridge. There must be a gap of at least $20$ m after each truck and a gap of at least $15$ m after each car. Trucks and cars travel at a speed of $36$ km/h. If cars and trucks go alternately, what is the maximum number of vehicles that can use the bridge in one hour? $1440$ $1200$ $720$ $600$
15
Sneha is picked up by her father by car from college everyday. The college gets over at 4 p.m. daily. One day, the college got over an hour earlier than usual. Sneha started walking towards her house. Her father, unaware of this fact., leaves his house as usual, meets his ... than usual. What is the ratio of the father's speed to sneha speed. I think it should be 8:1 but the anwser is 7:1.
16
Two trains, Calcutta Mail and Bombay Mail, start at the same time from stations Kolkata and Mumbai respectively towards each other.After passing each other, they take 12 hours and 3 hours to reach Mumbai and Kolkata respectively. If the Calcutta mail is moving with the speed of 48 km/h , the speed of the Bombay mail is (a)24 km/h (b)22 km/h (c)21 km/h (d)96 km/h
1 vote
17
18
The velocity $V$ of a vehicle along a straight line is measured in $m/s$ and plotted as shown with respect to time in seconds. At the end of the $7$ seconds, how much will the odometer reading increase by (in m)? $0$ $3$ $4$ $5$
19
It takes $10$ s and $15$ s, respectively, for two trains travelling at different constant speeds to completely pass a telegraph post. The length of the first train is $120$ m and that of the second train is $150$ m. The magnitude of the difference in the speeds of the two trains (in $m/s$) is ____________. $2.0$ $10.0$ $12.0$ $22.0$
20
On planet TIFR, the acceleration of an object due to gravity is half that on planet earth. An object on planet earth dropped from a height $h$ takes time $t$ to reach the ground. On planet TIFR, how much time would an object dropped from height $h$ take to reach the ground? $\left(\dfrac{t}{\sqrt{2}}\right)$ $\sqrt {2}t$ $2t$ $\left(\dfrac{h}{t}\right)$ $\left(\dfrac{h}{2t}\right)$
21
It takes $30$ minutes to empty a half-full tank by draining it at a constant rate. It is decided to simultaneously pump water into the half-full tank while draining it. What is the rate at which water has to be pumped in so that it gets fully filled in $10$ minutes? $4$ times the draining rate $3$ times the draining rate $2.5$ times the draining rate $2$ times the draining rate
22
A train that is $280$ metres long, travelling at a uniform speed, crosses a platform in $60$ seconds and passes a man standing on the platform in $20$ seconds. What is the length of the platform in metres?
23
A man can row at $8$ km per hour in still water. If it takes him thrice as long to row upstream, as to row downstream, then find the stream velocity in km per hour.
A car travels $8$ $km$ in the first quarter of an hour, $6$ $km$ in the second quarter and $16$ $km$ in the third quarter. The average speed of the car in km per hour over the entire journey is $30$ $36$ $40$ $24$
Velocity of an object fired directly in upward direction is given by ܸ$V\mathit{}=80-32 t\mathit{}$, where $t\mathit{}$ (time) is in seconds. When will the velocity be between $32 \;m/sec$ and $64 \;m/sec$? $\left(1, \dfrac{3}{2}\right)$ $\left(\dfrac{1}{2}, 1\right)$ $\left(\dfrac{1}{2},\dfrac{3}{2}\right)$ $\left(1, 3\right)$