15 taps can fill a tank in 36 minutes. How many taps will be required to fill the tank in one hour?

12 9 8 6

9

Formula to be used here, \( {V}_{1 } \) x \( { T}_{1 } \)  = \( { V}_{2 } \) x \( { T}_{2 } \) where, V = Taps, T = Time in minutes, ⇒ Putting values in the formula, ⇒ 15 x 36 = \( { V}_{2 } \) x 60 ⇒ \( { V}_{2 } \) = 9.