a tugboat goes 100 miles upstream in 10 hours. The return trip takes 5 hours. Find the speed of the tugboat without a current and the speed of the current. Speed is what and speed of current is

Question

ganpat · Answer

speed upstream = 100/10 = 10 miles/hr

Speed downstream = 100/5 = 20 miles/hr

so speed of boat = (20 + 10 )/ 2 = 15 miles/ hr

and speed of current = (20 - 10) / 2 = 5 miles/ hr..

anonymous · Answer

thanks

ganpat · Answer

understood ??

anonymous · Answer

yes
speed is 15 and speed of current is 5 miles

ganpat · Answer

h ah ah, not the answer, the formula stuff ??

anonymous · Answer

what do youi mean do I have to write the whole formula

anonymous · Answer

General solution:
$$2 \frac {d}{u+v} = 2(5) = 10 = \frac {d}{u-v}$$

anonymous · Answer

u = 3v

anonymous · Answer

Sorry @Ganpat thought you were done.

ganpat · Answer

i mean, y i have written something like that, from the whole book of formulas..

ganpat · Answer

@telliott99 : No issues brother !! every approach should be mentioned, so that the user may use the optimized one :) :)

anonymous · Answer

I am so confusd

anonymous · Answer

Sorry, just go with his answer above.  Come back when you need a general equation.

anonymous · Answer

Ganpat do I put the whole equation in

ganpat · Answer

over here ?? not required, but try to be complete in notes.. so that next time, you might understand, how to arrive to a solution.. 

I just wanted to make sure, u understood this..

anonymous · Answer

so what d I get for t speed and the speed of current

anonymous · Answer

See the very first post in this thread.

anonymous · Answer

I did i it 15mph for speed and 5 mlesfor the current

ganpat · Answer

u r right.. :)

anonymous · Answer

thanks