If a rope is 72 cm long and after stretching it reaches 90 cm, what is the percentage increase in length?
- 30%
- 25%
- 15%
- 20%
Explanation
Original length = 72 cm, stretched length = 90 cm.
Increase in length = 90 − 72 = 18 cm.
Percentage increase = (Increase ÷ Original length) × 100.
Percentage increase = (18 ÷ 72) × 100 = 25%.
Therefore, the rope’s length increased by 25%.
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