Question

The speed of a boat in still water is 15 km/hr. It goes 30 km upstream and returns downstream to the original point in 7 hours 12 minutes. Find the speed of the stream.

Answer 1

Answer:

Here is ur Answer.

Step-by-step explanation:

Given :

Speed of boat in still water =15 km/hr 

Let x be speed of the stream in km/hr

Speed of the boat upstream =15−x

Speed of the boat down stream =15+x

Time taken for upstream T1=15−x30

Time taken for downstream T2=15+x30

Given, T1+T2=29

=15−x30+15+x30=29

=30(15−x1+15+x1)=29

=30((15−x)(15+x)15+x÷15−x)=29

=225−x2