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crimeas [40]
3 years ago
6

Twin brothers, Andy and Brian mow their grandparent's lawn together in 12 minutes. Brian could mow the lawn himself in 10 minute

s more than it would take Andy. How long would it take each person to mow the lawn alone?
Mathematics
1 answer:
saveliy_v [14]3 years ago
4 0
Let
x = time of Byran's work
x + 10 = time of Andy's work

Rate is usually expressed a reciprocal. The total rate will be 12 minutes.
1/x + 1/(x + 10) = 1/12
The value of x will be 20 minutes.

Therefore Byran can take 20 minutes while Andy can take 30 minutes.
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