Question

Each key on the student calculators is 12 millimeters wide, and each key on the demonstration calculator is 4.8 centimeters wide. If the student calculators are 249 millimeters tall, how tall is the demonstration calculator?

Answer 1

I think the answer is 99.6. I'm sorry if it's wrong.

Answer 2

Alright, lets get started.

Each key on the student calculators is 12 millimeters wide, and each key on the demonstration calculator is 4.8 centimeters wide.

Means

When student calculator is 12 millimeters, demonstration calculator= 4.8 cms

When student calculator is 1 millimeter , demonstration calculator
`= (4.8)/(12)`

When student calculator is 1 mm , demonstration calculator
`= 0.4 cms`

So, when student calculator are 249 mm, demostration clculator
`= 249 *0.4`

Means 99.6 cms

Means demonstration calculator is 99.6 cms tall. : Answer

Hope it will help :)