Posted by roger on Friday, August 29, 2014 at 2:04pm.
A man goes upstream for a distance of 10 kms in 5 hours. Another man goes downstream the same distance of 10 kms in 3 hours. what is the difference in speeds of two men if the river speed is 0.5 km/hr
maths - Steve, Friday, August 29, 2014 at 2:17pm
since distance = speed*time, if the still-water speeds of the men are a and b,
(a-.5)(5) = 10
(b+.5)(3) = 10
5a - 5/2 = 10
3b + 3/2 = 10
b-a = (10 - 3/2)/3 - (10+5/2)/5 = 1/3
maths - roger, Friday, August 29, 2014 at 3:55pm
Sir, I am also getting this as the answer. but the options given are :-
maths - manoj, Wednesday, February 4, 2015 at 9:01am
maths - pradeep ponduri, Saturday, September 19, 2015 at 12:59pm
upstream speed =Distance/time
downstream speed of =10/3=3.33kmph
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