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Question 14a

Video explanation ↓

Two rectangular tanks, P and Q, had some water at first.Hatti poured 1/4 of the water from Tank P into Tank Q to fill it to the brim, without overflowing.How much water was there left in Tank P? (2 marks)

Question 14a diagram

Answer: 5400 cm³

Workings

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"Hatti poured 1/4 of the water from Tank P into Tank Q to fill it to the brim, "

that means the empty space in tank Q is equal to 1/4 of tank P

1/4 of tank P → length x breadth x height (8cm) = 25 x 9 x 8 = 1800 cm³

water left in tank P (fraction) → 1 - 1/4 = 3/4

1/4 of water tank P → 1800 3/4 of water tank P → 1800 x 3 = 5400 cm³

Video explanations

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