Haryana Police Constable Model Paper 7

Question : 52 of 101

Marks: +1, -0

Amit covers a distance at 75

\km\/\hr

and returns to the starting point at 50

\km\/\hr

. what is his average speed?

Solution:

Given:
Anil goes at

75 \km\/\h

and returns at

50 \km\/\hr

Formula:
Average speed

= {2\S_{1}\S_{2}}/{(\S_{1} + \S_{2})}

[\S_1, \S_2

are speed]
NOTE: This is only applicable when distance covered is same
Calculation:
Average speed

= (2 × 75 × 50) / (75 + 50) = 60 \km\/\hr

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