To fill a tank measuring 60 cm by 60 cm by 44 cm completely, it takes Tap E 36 minutes while it takes Tap F only 44 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 20 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 44
= 158400 cm³
= 158400 mℓ

Volume of 9 containers
= 20 x 20 x 20 x 9
= 72000 cm³ 
= 72000 mℓ

Remaining volume to be filled by the Tap E and Tap F 
= 158400 - 72000
= 86400 mℓ
= 86400 cm³

Fraction of the tank to be filled
= ⁸⁶⁴⁰⁰₁₅₈₄₀₀
= ⁶₁₁

Tap E:
1 tank → 36 min
1 min → ¹₃₆ tank

Tap F:
1 tank → 44 min
1 min → ¹₄₄ tank

Tap E and Tap F:
1 min → ¹₃₆ + ¹₄₄ = ¹¹₃₉₆ + ⁹₃₉₆ = ⁵₉₉ tank

1 tank = ⁹⁹₅ min

⁶₁₁ tank = ⁹⁹₅ x ⁶₁₁ = ⁵⁴₅ = 10.8

Answer(s): 10.80 min