Meenakshee cycles to her school at an average speed
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

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