Meenakshee cycles to her school at an average speed of 12 km/h and tak

1.	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
Answer» (c) 20 km/h Explanation: Speed = 12 km/h Time taken = 20 minutes = 20/60 hr = 1/3 hr Distance covered = S × T = 12 × 1/3 = 4 km Speed required to cover 4 km in 12 minutes = (4/12)×60 = 20 km/hr

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

Answer»

(c) 20 km/h

Explanation:

Speed = 12 km/h

Time taken = 20 minutes = 20/60 hr = 1/3 hr

Distance covered = S × T = 12 × 1/3 = 4 km

Speed required to cover 4 km in 12 minutes = (4/12)×60 = 20 km/hr