The speed of river stream is 2kmph. a person takes 4 times to row downstream. find the thrice the speed of the boat in still water.
Answers
Answered by
0
Answer:
km/hr
time upstream : time downstream = 2: 1
Speed is inversely proportional to time for a given distance and therefore,
speed upstream : speed downstream
= 1 : 2
Let speed upstream = x
speed downstream = 2 x
Speed in still water
=1 2 ( x + 2 x ) = 3 x 2
3 x 2 = 6 x = 4
speed upstream = x = 4
speed downstream = 2 x = 8
Rate of stream = 1 2( 8 − 4 ) = 2
Step-by-step explanation:
Similar questions