Question

A mechanic helper can change the oil and lubricate a car in 20 minutes how many cars can he service in this way in an 8 hour work day

Answer 1

24 cars

Explanation:

1 hour = 3 * 20 minutes

which means he can service 3 cars in an hour

for 8 hours:

8 hours * 3 cars = 24 cars

: he can service 24 cars in an 8 hour work day.