8pumps to fill a tank in 1hr 30min how.long will it take.if only 6pumps of the same type are used ???
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You have to use unitary method.
1 hr 30 min=60+30= 90 minutes
No of pumps | Time
8 | 90 minutes
6 | x
Since it is direct variation
8*90=6*x
720=6*x
Therefore x=720/6
x=120 minutes
120 minutes = 2 hours
Therefore 6 pumps will take 2 hours.
1 hr 30 min=60+30= 90 minutes
No of pumps | Time
8 | 90 minutes
6 | x
Since it is direct variation
8*90=6*x
720=6*x
Therefore x=720/6
x=120 minutes
120 minutes = 2 hours
Therefore 6 pumps will take 2 hours.
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