Question

Four engineers can complete a task in 5 hours. Assuming the rate of work remains constant, six engineers will complete the task in:

a. 7 h 30 min
b. 4 h 48 min
c. 126 h
d. 3 h 20 min​

Answer 1

Option (a) is correct.

Explanation:

Given that,

Four engineers can complete a task in 5 hours i.e.

4 engineer = 5h

1 engineer = (5/4) h

Assuming the rate of work remains constant,

6 engineer =
`(5)/(4)* 6`

= 7.5 hours

or

= 7 hours 30 minutes

Hence, six engineers will complete the task in 7 h 30 min.