Correct option is D
Given:
Time to fill tank with 44 pipes = 38 minutes
Number of pipes used = 37
Concept Used:
Filling time is inversely proportional to the number of pipes if their capacities are the same.
Formula Used:
where , T = time, P = pipe
Solution:
From the formula;
44 × 38 = 37 × T2
T2 = min.