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Murljashka [212]
3 years ago
11

Fred takes 3 hours to dig a garden. It takes Jason 5 hours to

Mathematics
1 answer:
Irina18 [472]3 years ago
7 0
It takes them 1 7/8 hrs to complete the job together.

How:
Fred = 3 hrs
Jason = 5 hrs

1/3x + 1/5x = 1/x

3x x 5x = 15 —> 3x/15 + 5x/15 = 15/15

3x + 5x = 8x —> 8x/15 = 1.875 = 1 7/8 hrs
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