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John knows that he can mow a rectangular lawn that measures 20 yards by 40 yards in 2 hours. He estimates that it should take him about 4 hours to mow a rectangular lawn that measures 40 yards by 80 yards. Is John's estimate reasonable?
taking the area of the first as: 20yrds(40yrds) = 800 sq. yrds getting John's rate in mowing you'll have: R = 800sq.yrds/2hours R = 400yd²/hour get the area of the second A = 40yds(80yds) = 3,200 sq. yds getting the number of hours needed to mow the area you'll have: t = 3,200/400 t = 8 hours then John's estimate is incorrect.
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