To fill a tank measuring 20 cm by 40 cm by 27 cm completely, it takes Tap A 45 minutes while it takes Tap B 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 6 cubic containers of edges 10 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 
= 20 x 40 x 27
= 21600 cm³
= 21600 mℓ

Volume of 6 containers
= 10 x 10 x 10 x 6
= 6000 cm³ 
= 6000 mℓ

Remaining volume to be filled by the Tap A and Tap B 
= 21600 - 6000
= 15600 mℓ
= 15600 cm³

Fraction of the tank to be filled
= ¹⁵⁶⁰⁰₂₁₆₀₀
= ¹³₁₈

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

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

Tap A and Tap B:
1 min → ¹₄₅ + ¹₄₅ = ¹₄₅ + ¹₄₅ = ²₄₅ tank

1 tank = ⁴⁵₂ min

¹³₁₈ tank = ⁴⁵₂ x ¹³₁₈ = ⁶⁵₄ = 16.25

Answer(s): 16.25 min