Question

Walt grew 10 centimeters in one year. He is now 1.6 meters tall. How tall was Walt one year ago in centimeters?

Answer 1

Answer:

One year ago, he had height of 150 cm.

Step-by-step explanation:

We have to model this situation.

The first step is having everything as the same unit. I am going to work in meters initially.

Each m is 100 cm. So 10cm = 10/100 = 0.1m.

I am also going to say that his height one year ago was x.

His height is now 1.6m, which is 10cm = 0.1m above his height last year, which was x. So

$1.6 = 0.1 + x$

$x = 1.6 - 0.1$

$x = 1.5$

His height last year was 1.5m.

In centimeters, that is 1.5*100 = 150 cm.