prettymuslim8487 prettymuslim8487

27-02-2024
Physics

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If a person travels for 30 minutes at the speed of 2 km/hr, and then travels for 20 minutes at the speed of 40 km/hr, what is his average speed?
a) 2/3 km/hr
b) 8 km/hr
c) 20 km/hr
d) 30 km/hr

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