Time and Distance Practice Test 3 with solutions

Question : 35 of 40

Marks: +1, -0

A person went to visit his friend at an average
speed of 50 km/hr. While coming back, he
reduced his speed by 15%. Find his average
speed.

Solution:

Speed of a person while coming back = 50 -

{15}/{100} × 50

= 42.5 km/hour
Average speed =

{2×50×42.5}/{50+42.5}

= 45.95 km/hour

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