SOLUTION: I need help setting up a problem. I'm totally stuck. please help me!
Question: It takes Sally 15 min to pick the apples from t he tree in her backyard. Lisa can do it in 25 min. H
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Question: It takes Sally 15 min to pick the apples from t he tree in her backyard. Lisa can do it in 25 min. H
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Question 138268This question is from textbook Algebra-Structure and Method-Book 1
: I need help setting up a problem. I'm totally stuck. please help me!
Question: It takes Sally 15 min to pick the apples from t he tree in her backyard. Lisa can do it in 25 min. How long will it take them working together? This question is from textbook Algebra-Structure and Method-Book 1
You can put this solution on YOUR website! It takes Sally 15 min to pick the apples from the tree in her backyard. Lisa can do it in 25 min. How long will it take them working together?
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Let t = time required when they work together
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Let the completed job of picking apples = 1
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Note that each will do a fraction of the job and the total of the two fractions has to equal 1: + = 1
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Just solve this equation by multiplying a number that will get rid of the denominators. 75 would be a good number
75* + 75* = 75(1)
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Cancel out the denominators and you have simple equation
5t + 3t = 75
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8t = 75
t =
t = 9.375 min 0r 9 min .375(60) = 8 min 22.5 sec
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You can easily check the solution: + =
.625 + .375 = 1, the completed job
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did this help you understand this type of problem, any questions?
