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NeTakaya
3 years ago
9

Jerry can detail a car by himself in 50 minutes. sally does the same job in 1 hour. how long will it take them to detail a car w

orking together?
Mathematics
1 answer:
siniylev [52]3 years ago
8 0
<u>Jerry:</u>

50 mins = 1 detailed car

1 min = 1/50 of the details

<u>Sally:</u>

60 mins = 1 detailed car

1 min = 1/60 of the details

<u>If they work together:</u>

1 min = 1/50 + 1/60 = 11/300 of the details

Total time needed:

300 ÷ 11 = 27.27 mins

Answer: They will need 27.27 mins if they worked together.
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