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Oksanka [162]
3 years ago
11

Francis ran 2 1/2 miles in 7/12 of an hour. How many miles can francis run in one hour?

Mathematics
2 answers:
nevsk [136]3 years ago
8 0

7/12 of 1 hour:

1 hour = 60 min.

7/12 * 60

7 * 5 = 35

Francis ran 2 1/2 miles in 35 min.

2 1/2 = 5/2


5/2 miles = 35 min

x miles = 60 min

(Cross Multiply)


5/2 * 60 = 35x

5 * 30 = 35x

150 / 35 = x

x = 30 / 7 = 4 2/7 miles


Francis ran 4 2/7 miles in one hour.


Artyom0805 [142]3 years ago
4 0
Since a fraction multiplied by the the numbers flipped (in this case, it's 12/7) gets you one, you have to multiply both 2 and 1/2 and 7/12 by 12/7 you get 4 and 4/14 miles ran in 2 hour
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