Question
A person travels from P to Q at a speed of 40 kmph and returns by increasing his speed by 50% . What is his average speed for both the trips ?
Answer: Option C
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Speed on return trip = 150% of 40 = 60 kmph.
`:.` Average speed = `((2 xx 40 xx 60)/(40 + 60))` km/hr
=` (4800/100)`km/hr = 48 km/hr
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