WAEC Mathematics 2017 Question 16

Question 16

Mensuration of Solids

The dimensions of a water tank are 13 cm, 10 cm and 70 cm. If it is half-filled with water, calculate the volume of water in litres.

  1. A.4.55 litres
  2. B.7.50 litres
  3. C.8.10 litres
  4. D.9.55 litres
Show the answer and explanation

Answer: A (4.55 litres)

Explanation

Full volume = 13 × 10 × 70 = 9100 cm³; half is 4550 cm³ = 4.55 litres (1000 cm³ = 1 litre).