To fill a tank measuring 60 cm by 60 cm by 43 cm completely, it takes Tap D 39 minutes while it takes Tap E only 41 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 5 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 60 x 43
= 154800 cm³
= 154800 mℓ

Volume of 5 containers
= 14 x 14 x 14 x 5
= 13720 cm³ 
= 13720 mℓ

Remaining volume to be filled by the Tap D and Tap E 
= 154800 - 13720
= 141080 mℓ
= 141080 cm³

Fraction of the tank to be filled
= ¹⁴¹⁰⁸⁰₁₅₄₈₀₀
= ¹⁰¹⁸₁₁₁₇

Tap D:
1 tank → 39 min
1 min → ¹₃₉ tank

Tap E:
1 tank → 41 min
1 min → ¹₄₁ tank

Tap D and Tap E:
1 min → ¹₃₉ + ¹₄₁ = ⁴¹₁₅₉₉ + ³⁹₁₅₉₉ = ⁸⁰₁₅₉₉ tank

1 tank = ¹⁵⁹⁹₈₀ min

¹⁰¹⁸₁₁₁₇ tank = ¹⁵⁹⁹₈₀ x ¹⁰¹⁸₁₁₁₇ = ²²⁷⁷₁₂₅ = 18.216

Answer(s): 18.22 min