Anew photocopier works 4 times as fast as an old one. when the machines work together, a university can produce all its staff manuals in 28 hours. find the time it would take each machine, working online, to complete the job.

The old photocopier can make x manuals in an hour. The new photocopier can make 4x. Combined, they made 5x manuals in an hour.

In one hour they can make 1/28 of the manuals.

1/(28*5)=1/140 is the rate.

The new photocopier can make all the manuals in 4/140 or 35 hours.

The old one can make them in 140 hours.

it could be 1,3 and more others to create a cylinder.

step-by-step explanation:

step-by-step explanation:

the shape,the size and the distance