A tap having diameter 'd' can empty a tank in 40 min.how long another tap having diameter 2d take to empty the same tank
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first tap is having diameter d let d=1 .
then time is 40 min
therefore another tap having diameter 2 will take 20 minutes to empty the tank that is 40÷2 =10
then time is 40 min
therefore another tap having diameter 2 will take 20 minutes to empty the tank that is 40÷2 =10
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