Question

The floor of rectangular hall has a perimeter of 250m its hight is 6m find the cost of painting its four walls at the rate of ₹6per square metre

Answer 1

so
2(l+b)=250m
l+b =125m
h=6m
curved surface area= 2(l+b)h
250×6=1500m square
1500×6=₹9000

Answer 2

This is the ans.
Hope it's helpful