Question

Find the cost of whitewashing the four walls of a room whose length is 6 m breadth is 5 M and height is 4 metre at the rate of Rs. 25 per square metre.

Answer 1

find the lateral surface area

formula

2h(l+b)

2×4(6+5)

2×(24+20)

2×44

88

whitewashing

88×25

rs2200