Question

If the velocity of the stream is 2km /hr then the time taken by ratanmajhi to cover 21 km in downstream and upstream is 10hrs .Find the quadratic equation.​

Answer 1

Step-by-step explanation:

Let speed in still water be x

Speed upstream =x−2

Speed downstream =x+2

Time upstream =

x−2

30

Time downstram =

x+2

30

Given:

x−2

30

=

x+2

30

+2

x−2

30

−

x+2

30

=2

x

2

−4

30(x+2−x+2)

=2

60=x

2

−4

x

2

=64

x=8