the lenght of a room is 5.5 m and width is 4 m . find the cost of paving the floor by slabs at the rate of rs . 800 per sq . metre .
area of the floor = ( 5.5 × 4 ) m 2 = 22 m 2 . cost of paving = rs . ( 800 × 22 ) = rs . 17600 . answer : option d
multiply(800, multiply(5.5, 4))