eddy2017
Elite Member
- Joined
- Oct 27, 2017
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this is a hard problem. Seems easy at first, so I will go for the choice 1 because the size of the field has been doubled then the time it takes to mow it will also double.
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?
Choose an answer
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?
Choose an answer
- Yes, because doubling the size of the field will double the amount of mowing time.
- No, because John will be able to mow a longer distance without changing direction, resulting in a shorter mowing time.
- Yes, because when the perimeter of the field is doubled, the total distance that the mower will need to travel is doubled.
- No, because doubling the dimensions of the field will increase the area of the field by 4, resulting in a mowing time of about 8 hours.