Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours. C is closed and A and B can fill the remaining part in 6 hours. The number of hours taken by C alone to fill the tank is:
Created: 5 years ago |
Updated: 2 years ago
best des
A + B + C fill the tank in 6 hrs
A + B + C fill in 2 hrs = 2/6 = 1/3
Remaining = 1 - 1/3 = 2/3
In 6 hrs A + B fill 2/3
In 1 hr A + B fill 2/3 × 1/6 = 1/9
Now C alone fill in 1 hr = 1/6 – 1/9 = 1/18
So, C needs 18 hrs to fill the tank.
ans: 18 hrs
Md Azizur Rahman
Founder of Satt
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