Question

6 pumps are required to fill a tank in 1 hour 20 minutes, then the time taken by 5 pumps of the same type is ?
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Answer 1

Answer:

1 hour 16.67 minutes

Step-by-step explanation:

6 pumps → 4/3 hours

5 pumps → x hours

cross multiply

4/3*5= 6x

20/3*1/6 = x

x  = 10/9 hours