Question
Download Solution PDFIf A drives from X to Y at 102 kmph and then from Y to X at 136 kmph, what is the average speed for the whole journey? (In kmph - upto two decimals)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Speed from X to Y = 102 kmph
Speed from Y to X = 136 kmph
Formula used:
Average Speed = (2 × Speed1 × Speed2) / (Speed1 + Speed2)
Calculation:
Average Speed = (2 × 102 × 136) / (102 + 136)
⇒ Average Speed = 27744 / 238
⇒ Average Speed = 116.57 kmph
∴ The correct answer is option (3).
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