math word problem

Question

A room is 18 feet long and 12 feet wide. The number of rubber tiles measuring 8 inches by 8 inches needed to cover the floor is

A)45

B) 27

C) 486

D) 286

E) 304

Answer 1

First we need to convert the units to the same extent.

1feet=12inches

18 feet= 18*12=216 inches

12 feet= 12*12=144 inches

No.of tiles=Area of rectangle / Area of each square

Area of rectangle =lb=216 * 144

Area of each square =s*s=8*8=64

=216 * 144 /64

=486

Therefore Room needs 486 Tiles to cover the whole Room