It takes Faucet E 20 minutes to fill a container measuring 16 cm by 9 cm by 11 cm completely while it takes Faucet Q only 20 minutes. How long will it take to completely fill the container with water if both faucets are turned on at the same time and 3 cubic cubes of edges 3 cm, filled with water, are poured into the container? Leave the answer in minutes and round off to 2 decimal places.
Time taken by Faucet E to fill the container:

20 min → 1 tank
1 min → ¹₂₀ tank

Time taken by Faucet Q to fill the container:
20 min → 1 tank
1 min → ¹₂₀ tank

Volume of the container
= 16 x 9 x 11
= 1584 cm³

Volume of 3 cubic cubes
= 3 x (3 x 3 x 3)
= 81 cm³

Time taken by Faucet E and Faucet Q to fill a container:
1 min → ¹₂₀ + ¹₂₀ =²₂₀ = ¹₁₀ container

¹₁₀ container → 1 min
1 container → 1 ÷ ¹₁₀ = 1 x ¹⁰₁ = 10 min

Remaining volume of the container to be filled by both faucets 
= 1584 - 81
= 1503 cm³

Time taken to fill the container
= ¹⁵⁰³₁₅₈₄ x 10
= 9.4886363636364
≈ 9.49 min

Answer(s): 9.49 min