1 Answer

Sam Adamsh · Answer 1 · 2021-01-15T14:22:15+0000

Answer:

150

Explanation:

Rate at which volume decrease:

(1 × 2 × 20/100) ÷ 30

= 1/75 m³/min

Total volume:

½ × (1.4 + 0.6) × 2 × 1

= 2 m³

Time = 2 ÷ 1/75

= 150 mins

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