Question
A man can row three-quarters of a kilometer against the stream in 11 ¼ minutes and return in 7 ½ minutes. The speed of the man in still water is________?
Answer: Option D
DISTANCE COVERED UPSTREAM IN 45/4MIN =3/4 KM
DISTANCE COVERED UPSTREAM IN 1 HR =(3/4 × 2/15 × 60) KM/HR = 4 KM/HR
DISTANCE COVERED DOWNSTREAM IN 15/2 MIN = ¾ KM
DISTANCE COVERED DOWNSTREAM IN 1HR
= (3/4 × 2/15 × 60)KM/HR = 6 KM/HR
SPEED OF THE MAN IN STILL WATER
= ½ (6 + 4)KM/HR = 5 KM/HR
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DISTANCE COVERED UPSTREAM IN 45/4MIN =3/4 KM
DISTANCE COVERED UPSTREAM IN 1 HR =(3/4 × 2/15 × 60) KM/HR = 4 KM/HR
DISTANCE COVERED DOWNSTREAM IN 15/2 MIN = ¾ KM
DISTANCE COVERED DOWNSTREAM IN 1HR
= (3/4 × 2/15 × 60)KM/HR = 6 KM/HR
SPEED OF THE MAN IN STILL WATER
= ½ (6 + 4)KM/HR = 5 KM/HR
Was this answer helpful ?
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