Question

A man can run 4km/hr in still water. If the speed of stream is 1 km/hr,then in what time the man will go 15 km against the speed of stream​

Answer 1

Answer:

Given :

Velocity of man wrt water, V

MW

=4 km/hr

Velocity of river, V

R

=2 km/hr

Distance covered in upstream or downward motion d=2 km each

For upstream motion of the boat :

Velocity of the man , V

M

=V

MW

−V

W

=4−2=2 km/h

∴ Time taken to go upstream t

1

=

2

2

=1 hr

For downward motion of the boat or (return journey) :

Velocity of the man V

M

=V

MW

+V

W

=4+2=6 km/h

∴ Time taken to go downstream t

2

=

6

2

=

3

1

hr

∴ Total time taken T=t

1

+t

2

=1+

3

1

=

3

4

hrs

Answer 2

Answer:

See the image provided to you

Step-by-step explanation:

PLS MARK IT AS BRAINLIEST

THANK ALL MY ANSWERS

FOLLOW ME

❤️