It takes Faucet S 40 minutes to fill a tank measuring 19 cm by 9 cm by 16 cm completely while it takes Faucet J only 10 minutes. How long will it take to completely fill the tank with water if both faucets are turned on at the same time and 5 cubic cubes of edges 5 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 S to fill the tank:

40 min → 1 tank
1 min → ¹₄₀ tank

Time taken by Faucet J to fill the tank:
10 min → 1 tank
1 min → ¹₁₀ tank

Volume of the tank
= 19 x 9 x 16
= 2736 cm³

Volume of 5 cubic cubes
= 5 x (5 x 5 x 5)
= 625 cm³

Time taken by Faucet S and Faucet J to fill a tank:
1 min → ¹₄₀ + ¹₁₀ =⁵₄₀ = ¹₈ tank

¹₈ tank → 1 min
1 tank → 1 ÷ ¹₈ = 1 x ⁸₁ = 8 min

Remaining volume of the tank to be filled by both faucets 
= 2736 - 625
= 2111 cm³

Time taken to fill the tank
= ²¹¹¹₂₇₃₆ x 8
= 6.172514619883
≈ 6.17 min

Answer(s): 6.17 min