Question

If 1 inch = 2.54cm, then set up and solve a proportion that finds how many inches, n, there are in 10 cm. (Round your answer to the nearest tenth)

Answer 1

Given:

1 inch = 2.54 cm

To find:

The number of inches, n, in 10 cm.

Solution:

We have,

1 inch = 2.54 cm

On dividing both sides by 2.54, we get

`(1)/(2.54)` inch = 1 cm

On multiplying both sides by 10, we get

`(1)/(2.54)* 10` inch = 10 cm

Now, number of inches n in 10 cm is

`n=(1)/(2.54)* 10`

`n=3.93700787402`

`n\approx 3.9`

Therefore, the number of inches in 10 cm is 3.9.