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Anna and Elsa are helping set up for the Christmas celebration at Magic Kingdom. They have to install 7 million lights for the annual displa
Question
Anna and Elsa are helping set up for the Christmas celebration at Magic Kingdom. They have to install 7 million lights for the annual display. It takes Elsa 14 days to set up the 7 million lights by herself and it takes Anna 11 days to set up the 7 million lights by herself. How long will it take them to do it together?
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Mathematics
4 years
2021-08-26T04:54:20+00:00
2021-08-26T04:54:20+00:00 1 Answers
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Answer:
If they work together, they will take 6.16 days.
Step-by-step explanation:
Elsa takes 14 days to complete the work.
So, 1 day work by Elsa is
Anna takes 11 days to complete the work.
So, 1 day work by Anna is
.
So, Let if they work together, it would take x number of days.
So, we can set up equation as
Find LCD, which is 154.
Simplify
Cross multiply,
25x=154
Divide both sides by 25
x=6.16 days
If they work together, they will take 6.16 days.