To fill a tank measuring 60 cm by 50 cm by 25 cm completely, it takes Tap C 48 minutes while it takes Tap D only 45 minutes. How long will it take to completely fill the container with water if both the taps are turned on at the same time and 9 cubic containers of edges 14 cm, filled to the brim with water are poured into the tank? Leave your answer in minutes and round off to 2 decimal places.
Volume of the tank 
= 60 x 50 x 25
= 75000 cm³
= 75000 mℓ

Volume of 9 containers
= 14 x 14 x 14 x 9
= 24696 cm³ 
= 24696 mℓ

Remaining volume to be filled by the Tap C and Tap D 
= 75000 - 24696
= 50304 mℓ
= 50304 cm³

Fraction of the tank to be filled
= ⁵⁰³⁰⁴₇₅₀₀₀
= ⁶⁶²₉₈₇

Tap C:
1 tank → 48 min
1 min → ¹₄₈ tank

Tap D:
1 tank → 45 min
1 min → ¹₄₅ tank

Tap C and Tap D:
1 min → ¹₄₈ + ¹₄₅ = ¹⁵₇₂₀ + ¹⁶₇₂₀ = ³¹₇₂₀ tank

1 tank = ⁷²⁰₃₁ min

⁶⁶²₉₈₇ tank = ⁷²⁰₃₁ x ⁶⁶²₉₈₇ = ⁷⁷⁸⁹₅₀₀ = 15.578

Answer(s): 15.58 min