Question

find the cost of papering the walls of a room 2m by 7m by 4m with paper 50cm wide at rs 4.50 per metre a deduction of 15 sq metres being made for windows etc​

Answer 1

rs 126 is answer

steps are :-

first of all find volume of the Room

=2*4*7=56

next find how much paper is essential

=56*50/100=56*1/2=28

next find how much meters of paper is essential

=28*4.5=126.0

in that area 15part has been made of glass

=126-15=111

therefore they need 111 meters of paper