Yoyo swims 26 km downstream in same time as 14 km upstream. What is his speed in still water if speed of stream is 3 km/hr?
Answer & explanation
Correct answer: option 1
Speed of stream i.e. y = 3 km/hr
Speed of boat in still water i.e. x = ?
According to the question:
\(\frac{26 }{\text{x + 3} }\) = \(\frac{14 }{\text{x - 3} }\)
26 ( x - 3) = 14 ( x + 3)
13 ( x - 3) = 7 ( x + 3)
13 x - 39 = 7 x + 21
6 x = 60
x = 10 km/hr