A train moving at a uniform speed covers 36km in 21 minutes. How long does
MATHEMATICS
WAEC 2005
A train moving at a uniform speed covers 36km in 21 minutes. How long does it take to cover 60km?
- A. 35 mins
- B. 40 mins
- C. 45 mins
- D. 90 mins
Correct Answer: A. 35 mins
Explanation
Since 36km in 21 minutes
1km in \(\frac{21}{36}\)minutes
60km in \(\left(\frac{21}{36}\times 60\right)\)minutes = \(\frac{70}{2}\)min
= 35 mins
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