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Question

Meenakshee cycles to her school at an average speed of 12 km/hr and takes 20 minutes to reach her school. If she wants to reach her school in 12 minutes, her average speed should be:


A

203 km/hr

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B

16 km/hr

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C

20 km/hr

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D

15 km/hr

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Solution

The correct option is C

20 km/hr


If the time taken decreases, then speed will increase. It is a case of inverse proportion.
Speed of car(km/hr)12XTime taken (mins)2012

Then, 12×2060=x×1260x=12×2060×6012=20km/hr


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