A person travels a distance of 30 km at a speed of 60 km/hr and then comes back at twice the speed. How many minutes did he take in total?
Solution
Correct Answer: Option C
The person travels, 60 km in 60 minutes
30 km in 60*30/60 minutes
= 30 minutes
On the way back, the person travels,
60 km in 30 minutes
30 km in 30*30/60 minutes
= 15 minutes
Total time = 30 + 15 minutes = 45 minutes
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