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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, then what should be her average speed?

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
Higher is the speed, lesser will be the time taken to cover the same distance.
Hence, it is a case of inverse proportion.

Speed of car(km/hr)12XTime taken (mins)2012

1220=12x

x=20 km/hr

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