To construct a wall, sand and cement are mixed in the ratio of 3:1. The cost of sand and that of cement are in the ratio of 1:2. If the total cost of sand and cement to construct the wall is 1000 rupees, then what is the cost (in rupees) of cement used?

Can anybody explain why are they dividing the number of pages by page size?According to me, it should be – Page table size = Number of entries * entry sizei.e PT size =...