Question

An office is 20 feet long

Answer 1

Find volume V

Length L = 20 feet,

Width W= 15

Height H = 12

Volume V a= Lx Wx H = 20x15x12 = 3600 cubic foot

Then for 1 year , it costs = 3600x 9 cents= 32400 cents

For 1 month , (divide by 12) = 32400/12 = 2700

Then answer is

Aircondition this office ,for 1 month costs $2700 cents