Question 11
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)203km/h
(b)16 km/h
(c)20 km/h
(d) 15 km/h
Given, speed of cycle =12 km/h
Time taken by Meenakshee through cycle =20 min
Then, total distance cover =12×2060=4 km [∵ distance =time × speed]
If Meenakshee want to reach her school in 12 min, then her cycle speed should be 41260i.e. 20 km/h. (∵speed=distancetime)
Hence, option (c)is correct.