When heated an iron bar expands 2%. If the increased length is 1 cm, what is the original length of the bar?

When heated an iron bar expands 2%. If the increased length is 1 cm, what is the original length of the bar?

A 500 cm

B 5 cm

C 0.97 cm

D 1.97 cm

Solution

Correct Answer: Option A

.02% is 1 cm

1% is 1/.02

100% is 100/.02 = 500cm