three pipes a b and c can fill a swimming pool in 6 hours after working together for two hour she is closed and A and B fill the remaining remaining part in 7 hours find the number of hours taken by sea alone to fill the swimming pool
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8 whole 1/2
Step-by-step explanation:
1 tap can fill the tap in = (3×6)hours
=>18 hours
1 tap's 1 day work =1/18
total no. of days =(2+7)hours
=>9 hours
remaining work=1-1/18
=>(18-1)/18
=>17/18
c can finish in =>(17/18)×9
=>17/2
=> 8.5 hours
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