Question

http://prntscr.com/670041 Help? :/

Answer 1

@ribhu

Answer 2

I hate math. ><

Answer 3

see let the volume of the pool be V

Answer 4

so the rate at which pipe fills pool becomes V/8

Answer 5

so is it A?

Answer 6

wait
lear the trick to solve it

Answer 7

and r is the rate at which sprinkler fills.
so (V/8 + r ) becomes the rate at which the sprinkler and pool fill it.

Answer 8

so r = v/5 - v/8
r = v*3/40

Answer 9

answer is B