Suraj covers a distance of 18 km in 12 minutes. If his speed is decreases by 30 km/hr, then how much time will Suraj take to cover the same distance?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 18 minutes.
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18 km is covered in 12 minutes = 12/60 = 0.2 hours Speed = 18/0.2 = 90 km/hr |
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If speed is decreased by 30 km/hr New speed = 60 km/hr Time taken to cover 18 km = 18/60 = 0.3 hours = 0.3 × 60 = 18 minutes |