Asked by Nicholle
Suppose that it takes Sally 3 hours to mow, and it takes Tom 4 hours to mow the same lawn; Tom's mower is less powerful than Sally's. Without using algebra determine how long it would take Sally and Tom to mow the lawn if they worked together using both lawn mowers. Comparing and scaling
Answers
Answered by
Steve
hmmm. no algebra? How about
Sally can mow 4 lawns in 12 hours
Tom can mow 3 lawns in 12 hours
together they can mow 7 lawns in 12 hours.
So, that means 12/7 hours/lawn
Sally can mow 4 lawns in 12 hours
Tom can mow 3 lawns in 12 hours
together they can mow 7 lawns in 12 hours.
So, that means 12/7 hours/lawn
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