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Don can complete 4 jobs in 3 days. Lily can complete 5 jobs in 2 days. Working together how long will it take them to complete 25 jobs?

User Vedom
by
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1 Answer

4 votes

Answer:

approximately 7 days.

Explanation:

Don takes time to complete 4 jobs = 3 days

he completed his job in 1 day =
(4)/(3)

Lily takes time to complete 5 jobs = 2 days

Lily completed her job in 1 day =
(5)/(2)

Working together they can complete the job in 1 day

=
(4)/(3)+ (5)/(2)

=
(8+15)/(6)

=
(23)/(6)

Working together it will take time to complete 25 jobs

= 25 ÷
(23)/(6)

=
25* (6)/(23)

=
(150)/(23)

=
6(12)/(23) days

= 6.52 ≈ 7 days

It will take 6.52 or approximately 7 days to complete 25 jobs together.

User Daniel Jour
by
7.7k points

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