Question:
Meenakshee cycles to her school at an average speed of 12 km/h and takes 20 minutes to reach her school. If she wants to reach her school in 12 minutes, her
average speed should be
(a) 20/3 km/h
(b) 16 km/h
(c) 20 km/h
(d) 15 km/h
Solution:
(c) 20 km/h
Explanation: Speed = 12km/h
Time taken = 20 minutes = 20/60 hr = 1/3 hr
Distance covered = S × T = 12 × 1/3 = 4km
Speed required to cover 4km in 12 minutes = (4/12)×60 = 20 km/hr
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.