Two pipes A and B can fill a tank in 20 and 30 minutes respectively . If both the pipes are used together , then how long will it take to fill the tank ?
Created: 6 years ago |
Updated: 3 years ago
best des
A pipe fill 1/20 portion of tank in 1 min
B pipe fill 1/30 portion of tank in 1 min
So, together pipe fill ( 1/20 + 1/30) portion of tank in 1 min
= ( 3 + 2) / 60 = 1/12
Now, they fill 1/12 portion in 1 mint
So, they fill 1 (whole) portion in ( 1×12)/1 = 12 minutes
Md Azizur Rahman
Founder of Satt
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