Question

A man can row at a speed of 9.5 km/hr in still water. If he takes 2 times as long to row a distance upstream as to row the same distance downstream, then the speed of stream (in km/hr) is:

Answer 1

Answer:

the speed of stream (in km/hr) is 3.167

Step-by-step explanation:

A man can row at a speed of 9.5 km/hr in still water. he takes 2 times as long to row a distance upstream as to row the same distance downstream,

Speed in still water = 9.5 km/hr

Speed of Stream = S km/Hr

Downstream speed = 9.5 + S km/Hr

Upstream Speed = 9.5 - S km/Hr

Let Say Distance = D  km

Time Down Stream = D/(9.5 + S)  hr

Time Upstream = D/(9.5 - S)   hr

D/(9.5 - S)  = 2 * D/(9.5 + S)

=> 9.5 + S = 19 - 2S

=> 3S = 9.5

=> S = 9.5/3  

=> S = 3.167 km/hr

Answer 2

➤Question ⤵⤵⤵⤵

A man can row at a speed of 9.5 km/hr in still water. If he takes 2 times as long to row a distance upstream as to row the same distance downstream, then the speed of stream (in km/hr) is:

➤ Answer ⤵⤵⤵⤵⤵

➤Speed in stell water = 9.5 km / hr

➤Speed of stream = S km / hr

➤Downstream speed = 9.5+ S km / Hr

Upstream speed = 9.5- S km/ Hr

➤ Let say Distance = D km

➤ Time down stream = D / ( 9.5 + S)

➤ Time upstream = D / ( 9.5 - S ) hr

➤ D / ( 9.5 - S) = 2✖ D / ( 9.5 + S)

➤ 9.5 + S = 19 - 2S

➤ 3S = 9.5

➤ S = 9.5 / 3

➤ S = 3.167 Km/ Hr

$\red{ \: Answer \: is \: 3.167 \: km \: / hr \: }$

$\green{ \: i \: hope \: it \: is \: helpful \: for \: you \: }$