Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Rajeshkumar
Group Title
A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?
 3 years ago
 3 years ago
Rajeshkumar Group Title
A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?
 3 years ago
 3 years ago

This Question is Closed

dumbcow Group TitleBest ResponseYou've already chosen the best response.1
The current is 1 so the man can row 4 kmph upstream and 6 kmph downstream distance = rate*time d = 4t1 d = 6t2 t1 + t2 = 1 use substitution t1 = 1  t2 4(1t2) = 6t2 solve for t2 4  4t2 = 6t2 4 = 10t2 0.4 = t2 then d = 6*0.4 = 2.4 The place is 2.4 km away
 3 years ago

robtobey Group TitleBest ResponseYou've already chosen the best response.0
t=d/r Assume the place is down stream. Let x = the time it takes to row downstream. Solve the following simultaneous equations for x and d:\[\left\{x\text{=}\frac{d}{6},(1x)\text{=}\frac{d}{4}\right\}\]\[\left\{x\to \frac{2}{5},d\to \frac{12}{5}\right\} \]If the place is up stream then let x = the time it takes to row upstream.\[\left\{x\text{=}\frac{d}{4},(1x)\text{=}\frac{d}{6}\right\}\]\[\left\{x\to \frac{3}{5},d\to \frac{12}{5}\right\} \]In either case the place is 12/5 or 2.4 km from the departure point.
 3 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.