Question

34. One delivery driver can complete a route in 6 h. Another driver can complete the same route

in 5 h. If the drivers work together, about how many hours will they take to complete the route?
Round your answer to the nearest tenth.


A. 1 hour
b. 2.7 hours
C. 5 hours
D. 11 hours

Answer 1

C. 5 hours

Explanation:

We know

One delivery driver can complete a route in 6h

The rate is 1/6

One delivery driver can complete a route in 5h

The rate is 1/5

To solve this, we use the equation

rate + rate = together rate

1/6 + 1/5 = 1/y

10/60 + 12/60 = 1/y

22/60 = 1/y

y = 5 hours

So, the answer is C. 5 hours