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Walter takes 7/10 of an hour to mow 2/5 of an acre of lawn. At this rate, how many races will he mow in an hour?
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4 votes
Walter takes 7/10 of an hour to mow 2/5 of an acre of lawn. At this rate, how many races will he mow in an hour?

User Pedro Moreira
by
8.4k points

2 Answers

4 votes

Answer:

4/7 acres per hour

Explanation:

User Jason Haley
by
8.0k points
2 votes
7/10 of an hr.......60 min / hr.....7/10(60) = 420/10 = 42 minutes

42 / (2/5) = 60 / x......42 minutes to 2/5 acre = 60 minutes to x acres
cross multiply
42x = 2/5(60)
42x = 120/5
42x = 24
x = 24/42
x = 4/7....he will mow 4/7( or 0.57) acres in 1 hr
User Eduardo Ruela
by
7.8k points
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