Question

Find the cost of tilling the floor of room at the rate of Rs.8 per squ.meter where the room measures 250m long and 100m broad

Answer 1

total area of room = 250* 100=  25000 sq. m
total cost of tiling = 8*25000 = 200000 Rs

Answer 2

first
area of the floor = length x breath
                          = 250 x 100
                          = 25000 squ.meter
 now, 
          area of floor ÷ total cost of tilling 1squ.meter  = total cost of tilling the floor
           = 25000 ÷ 8 = 3125 rupees.