Question

two tape a and b can fill a water tank in 22 and 33 hour respectively they were opened together but befour 7 hour tap B was closed. how many more time tap a take to fill the tank​

Answer 1

Answer:

a takes = 22 hrs.

b takes= 33 hrs.

33-7= 26 hrs.

a takes = 26+15

=41 hrs answer

Answer 2

Answer:

a takes = 22hr

b takes =33 hr

part of tank filled by a and b In 1 hr = 1/22 and 1/33 respectively

therefore part of tank filled by both in 1 hr= 1/22+1/33

=5/66

part of tank filled by b in 7hr=1/33×7

=7/33

therefore more time for a = 7/33-1/22

=12/66

time taken = 66/12

=

$5 \times \frac{1}{2}$ hr