WAEC Mathematics 2015 Objective — Question 36
Question 36 of 50 from the West African Examinations Council (WAEC) Mathematics 2015 Objective paper, with the correct answer and a full explanation.
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The area of a rhombus is 110cm². If the diagonals are 20 and (2x+1)cm long, find the value of x.
- A. 5.0Correct
- B. 4.0
- C. 3.0
- D. 2.5
Explanation
Area = (1/2)d₁d₂ → 110 = (1/2)(20)(2x+1) → 110 = 10(2x+1) → 11=2x+1 → x=5.0.
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