On a set of house plans, the scale is 2 cm : 5 m. if the actual length of a room is 18 m, what is the length of the room on the plans?
(a.) 2.5
(b.) 3.6
(c.) 7.2
(d.) 9

C. 7.2 cm

Step-by-step explanation:

It gives you the proportion.

2cm is to 5 m as 'x' cm is to 18 m

Or

2/5 = x/18

now cross multiply to solve for 'x'

5x = 36

   x = 36/5

       x = 7.2

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743

it is a secret for it not to be compromised sorry

step-by-step explanation: