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WAEC Mathematics 1993 Question 17

Question 17

Mensuration of Plane Shapes

The area and a diagonal of a rhombus are 60cm2 and 12cm respectively. Calculate the length of the other diagonal.

  1. A.5cm
  2. B.6cm
  3. C.10cm
  4. D.12cm
  5. E.15cm
Show the answer and explanation

Answer: C (10cm)

Explanation

Area of a rhombus = ½ × d1 × d2, so 60 = ½ × 12 × d and d = 10 cm.