Dimensions of hall are 20m*15m*8m. Find the cost of paintig its walls at the rate of Rs.15sq.m. ?

Dimensions of hall are 20m*15m*8m. Find the cost of paintig its walls

1.	Dimensions of hall are 20m15m8m. Find the cost of paintig its walls at the rate of Rs.15sq.m. ?
Answer» Area to be painted = area of 4 side walls + area of ceiling or the top of the hall\xa0Area to be painted = 2h(l+b) + lb\xa0= 2 × 8 (20+15) + 20× 15 = 16 × 35 + 20 ×15 = 560 + 300 = 860 m2cost of paintind 1m2 =Rs 15cost of painting 5100m =860 × 15 = Rs 12,900