Question

If it takes Sally 5 hours to clean the house, how long will it take Sally and her two friends to do the job if they work at the same rate?

A. 1 1/3

B. 1 2/3

C. 2 1/3

D. 2 2/3

Answer 1

Sally (1 person) took 5 hours. how long will it take 3 people?

5 hours / 3 people = 5/3 = 1 2/3

The answer is B

Answer 2

Option B.
`1(2)/(3)`

Explanation:

Sally takes time to clean the house = 5 hours

If Sally and her two friends do the job at the same rate,

The time for the same work done by 3 people = time taken by one / number of people

=
`(5)/(3)`

=
`1(2)/(3)`

It will take
`1(2)/(3)` hours to clean the house by 3 people.