A race has three parts. The speed and time required to complete the individual parts for a runner is displayed on the following chart : Part I Part II Part III Speed (kmph) 9 8 7.5 Time (minutes) 50 80 100 What is the average speed of this runner ? [2019 CDS-I]

UPSC CDS I 2019 Math Paper

Question : 31 of 100

Marks: +1, -0

A race has three parts. The speed and time required to complete the individual parts for a runner is displayed on the following chart :

	Part I	Part II	Part III
Speed (kmph)	9	8	7.5
Time (minutes)	50	80	100

What is the average speed of this runner ?

[2019 CDS-I]

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