Question

A wall in total has a volume of 100meteres cube,the length of the wall 3m,width 5m,if a paint is £12.99and uses 30meteres of the wall,how much will it cost to paint the whole wall

Answer 1

£8.660

Explanation:

Volume = h * w * l

Area = h * l

Length = 3m

Width = 5m

Height = x

100 = h * 5 * 3

100/15 = h

h = 20/3

Area= 20/3 * 3 = 60/3 = 20m^2
12.99/x = 30/20 (cross multiply)

(12.99 * 20)/39

£8.66 to cover 20 m^2