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WAEC Mathematics 2013 Objective — Question 7

Question 7 of 50 from the West African Examinations Council (WAEC) Mathematics 2013 Objective paper, with the correct answer and a full explanation.

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If ₦2,500.00 amounted to ₦3,500.00 in 4 years at simple interest, find the rate at which the interest was charged.

  • A. 5%
  • B. 7½%
  • C. 8%
  • D. 10%Correct

Explanation

I = PRT/100. I=1000, P=2500, T=4. 1000 = (2500×R×4)/100 = 100R. R = 10%.

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