Question

please solve this question friends fast fast fast board exam hai jaldi kar lo solve kar do
Q3

Answer 1

Here,
Both pipes can fill the pool in 4 hours.
So, In 1 hour , Both will fill 1/4th of pool.
And, In 3 hour, Part of pool filled = 3*1/4 = 3/4 th

Now,
Part to be filled alone by second pipe
= 1- 3/4 = 1/4.
Since, 1/4 th part of pool filled by second pipe in 3 hours .
So, Second pipe alone can fill the pool in
3/(1/4)= 3*4 = 12 hours.
And, Time taken by first pipe to fill alone will be
1/4 - 1/12 = 2/12 = 1/6 i.e. 1/6th part will be filled in 1 hour. So, First pipe will fill the pool completely in 6 hours.