Question

A stamping machine can stamp 40 envelopes in 8 minutes. How many of stamping machines, working at the same time, are required to stamp 120 envelopes per minute?

Answer 1

Given:

A stamping machine can stamp 40 envelopes in 8 minutes.

That means in one minute the number of envelopes stamp by machine is,

`(40)/(8)=5\text{ envelopes per minute}`

The machine required to stamp 120 envelopes per minute is,

`(120)/(5)=24\text{ machines}`

Answer: 24 machines will required to stamp 120 envelopes per minute.