Question

A room is 15m long and 7m wide and 3.5m height find the cost of covering it's wall by a paper of 50cm wide at the rate of 1.50 Ra per metre

Answer 1

area of four wall=2(l+b)×h
=2×(15+7)×3.5
=44×3.5=154m sq
and then u should proceed with your value given..try to get