The area and a diagonal of a rhombus are 60 cm 2 and 12 cm
MATHEMATICS
WAEC 1993
The area and a diagonal of a rhombus are 60 cm2 and 12 cm respectively. Calculate the length of the other diagonal.
- A. 5cm
- B. 6cm
- C. 10cm
- D. 12cm
Correct Answer: C. 10cm
Explanation
Area of rhombus = \(\frac{pq}{2}\)
where p and q are the two diagonals of the rhombus.
\(\therefore 60 = \frac{12 \times q}{2}\)
6q = 60 \(\implies\) q = 10 cm
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