It takes Faucet H 35 minutes to fill a tank measuring 17 cm by 9 cm by 13 cm completely while it takes Faucet N only 15 minutes. How long will it take to completely fill the tank with water if both faucets are turned on at the same time and 4 cubic cubes of edges 2 cm, filled with water, are poured into the tank? Leave the answer in minutes and round off to 2 decimal places.
Time taken by Faucet H to fill the tank:

35 min → 1 tank
1 min → ¹₃₅ tank

Time taken by Faucet N to fill the tank:
15 min → 1 tank
1 min → ¹₁₅ tank

Volume of the tank
= 17 x 9 x 13
= 1989 cm³

Volume of 4 cubic cubes
= 4 x (2 x 2 x 2)
= 32 cm³

Time taken by Faucet H and Faucet N to fill a tank:
1 min → ¹₃₅ + ¹₁₅ =¹⁰₁₀₅ = ²₂₁ tank

²₂₁ tank → 1 min
1 tank → 1 ÷ ²₂₁ = 1 x ²¹₂ = 10.5 min

Remaining volume of the tank to be filled by both faucets 
= 1989 - 32
= 1957 cm³

Time taken to fill the tank
= ¹⁹⁵⁷₁₉₈₉ x 10.5
= 10.331070889894
≈ 10.33 min

Answer(s): 10.33 min