I walk at a speed of 10 km/h and reach the destination in 2 hrs, exactly on time. If I increase my speed by 5 km/h, how early would I reach my destination?
40 minutes
The correct answer is Option 3 i.e. 40 minutes.
Distance = speed × time
Distance = 10 × 2 = 20 km
New speed = 10 + 5 = 15 km/hr
New time = 20/15 = 4/3 hours = 1 hour 20 minutes
Time saved = 2 hours - 1 hour 20 minutes = 40 minutes
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