gate 2011

Question

The fuel consumed by a motorcycle during a journey while traveling at various speeds is indicated in the graph below.

The distances covered during four laps of the journey are listed in the table below

Lap	Distance (kilometers)	Average speed (kilometers per hour)
P	15	15
Q	75	45
R	40	75
S	10	10

From the given data, we can conclude that the fuel consumed per kilometer was least during the lap

(A) P
(B) Q
(C) R
(D) S

Comments

answer - B)

as for option a) ditance = 15 km, avg speed= 15 so fues consumption = 45 km /litre
 = > 45km -  1 litre
= >  15 km -  1/3 litre
and fuel consumption litre per km = (1/3)/15 = 1/45 litre/km

similarly, for Q- 1/90,
R- 1/75
and S- 1/30

hence B)

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Please explain more...

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@arjun sir
pls explain more

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they are asking the fuel consumed per kilometer was least during the lap