raj549985
raj549985 raj549985
  • 25-07-2019
  • Mathematics
contestada

Qn.11 plz help this with step ​

Qn11 plz help this with step class=

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salatulmaghrib
salatulmaghrib salatulmaghrib
  • 25-07-2019
The answer is 7.5 days
explanation:
80 is four times 20.
80 people should be able to do the job four times faster than 20 people.
So, they should take 1/4 the time.
If 20 people take 30 days, 80 people should take 30/4=7.5 days.
**
simpler explanation:
30*20/80=7.5
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