Question

A factory employee spends two hours putting together a car part. A machine can do the same job in thirty minutes

Answer 1

Time spent by employee = 2 hours = 120 minutes

Time spent by machine = 30 minutes

Ratio:

`= (120)/(30 )`

`= (12)/(3)`

`= (4)/(1 )`

= 4 : 1

Difference between the time taken by a employee and machine to do a job

= 120 - 30

= 90 minutes