A man takes 5 minutes to cover a certain distance at a speed of 6 km/h. If he walks at a speed of 10 km/h, how much time (in minutes) will he take to cover double the distance?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 6.
Time = 5 min = 5/60 = 1/12 hr
Distance = Speed × Time = 6 × 1/12 = 0.5 km
Double the distance = 1 km
New speed = 10 km/h
Time = 1/10 hr = 60/10 minutes = 6 minutes