Question

A godown is 50 m long, 40 m broad and 10 m high. Find the cost of whitewashing its four walls and ceiling at ₹ 20 per square metre .

Answer 1

C.s.a of cuboid = 2bh+2hl
2*(40*20)+2*(50*10)
So, (800*2)+(500*2)
1600+1000=2600m sq.
Cost 20rs.
So, 20*2600=
5200rs.

Answer 2

long = 50m
broad = 40m
high = 10m
= L×b×h
=50×40×10
= 20,000m
cost = 20
20,000×20
=4,00,000