Question

The length,breadth and height of a hall are 5m, 6m, and 7m, respectively. The has one door of area 1m× 0.5m. Find the cost of painting the walls (only the walls) at the rate of ₹90 per square metre.​

Answer 1

Answer:

l=5m

b=6m

h=7m

f=2{l+b}h

2×11×7

22×7

154cm

area of one door =5m

area of hall excluding door =149m

cost of panting = 149m×90=13940rs.