a tank of 100litres has two taps one tap pours in 60L in 5mins and takes out 14L in 2mins. find the time taken to fill that tank when both taps are open

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  1. Divide the volume (L) by the net fill rate (L/min):

    100/(60/5 - 14/2) = 20 min

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  2. 60 L in 5 min ----> 12 L in 1 minute = input
    14 L in 2 min ----> 7 L in 1 minute = output

    net input = 5 L/min

    time to fill 100L
    = 100/5 L/min
    = 20 minutes

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