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36 votes
36 votes
HELP I beg please, this is due and I don’t know how to do it. Please pick any of them to do…

HELP I beg please, this is due and I don’t know how to do it. Please pick any of them-example-1
User Brian Risk
by
2.7k points

1 Answer

21 votes
21 votes

Answer:

5. 4 hour 17 minutes

Explanation:

Lilith can complete work in 6 hours so every hour she will complete 1/6 of the work

Janice can complete work in “x” hours so every hour she will complete 1/x of the work.

so if they both work together in 2.5 hours

Lilith will complete 2.5(1/6) work

Janice will complete 2.5(1/x) work

so 2.5(1/6) + 2.5(1/x) = 1

=> 1/6 + 1/x = 0.4

=> 1/x = 0.4 - 1/6

=> 1/x = 2.4/6 - 1/6

=> 1/x = 1.4/6

=> 1(6) = 1.4(x)

=> x = 6/1.4 = 5.6/1.4 + 0.4/1.4 = 4 + 0.4/1.4 hours

since 0.4/14 hour = (0.4/14)60 = 17.1 or 17 minutes

so x = 4 hour + 17 minutes

I hope this will help to solve the other problems

User Mike Holdsworth
by
2.8k points
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