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Amy can mop the store in 30 minutes. James can mop the store in 45 minutes. How long would it take them if they worked together?

Amy can mop the store in 30 minutes. James can mop the store in 45 minutes. How long would it take them if they worked together?
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1 vote
Amy can mop the store in 30 minutes. James can mop the store in 45 minutes. How long would it take them if they worked together?

User Jasim Juwel
by
7.6k points

1 Answer

5 votes
solve the equation 1/30 + 1/45 = 1/x

where x is the required time

multiply thru by 90x:-

3x + 2x = 90

x = 90 / 5 = 18

answer 18 minutes
User Christophe Willemsen
by
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