Question
Walking at 80% of his usual speed, a man is 10 mins late to his office. Find the usual time taken by hime to reach his office.
Answer: Option C
LET HIS
USUAL SPEED BE X KMPH
USUAL TRAVEL TIME BE T HOURS
DISTANCE TO OFFICE BE D KM D=XT D=(0.8X)*[T+(10/60)] XT=0.8XT+(2X/15) SOLVING,
T=40 MINUTES
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LET HIS
USUAL SPEED BE X KMPH
USUAL TRAVEL TIME BE T HOURS
DISTANCE TO OFFICE BE D KM D=XT D=(0.8X)*[T+(10/60)] XT=0.8XT+(2X/15) SOLVING,
T=40 MINUTES
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