Answer :

Speed of boat in still water = 4 km/h


Let the speed of stream be 'x'


Therefore,


Speed of the boat upstream = Speed of boat in still water - Speed of stream = 4 - x


Speed of the boat downstream = Speed of boat in still water + Speed of stream = 4 + x


Time taken to go upstream


Time taken to go downstream


Given, time taken in upstream is thrice as in downstream





4 + x = 12 - 3x


4x = 8


x = 2


i.e. the speed of stream = x is 2 km/hour.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Heights and Distances-IHeights and Distances-IHeights and Distances-I45 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

Solve the followiNCERT - Maths Exemplar

Solve the followiNCERT - Maths Exemplar

Solve for x and yRS Aggarwal - Mathematics

Sum of the areas Mathematics - Board Papers

A man can row a bRS Aggarwal - Mathematics