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Problem 9 - Entrance Test

A marathon runner improves his time by 4% and now finishes in 3 hours 48 minutes. What was his original time?

Correct: C

New time = 3 h 48 m = 228 minutes. This is 96% of the original time (100% – 4%). Original time = 228 ÷ 0.96 ≈ 237.5 minutes = 3 h 57 m 30 s.