Question

RIVER - BOAT PRO
9. The velocity of a boat in still water is 10 m/s.
If water flows in the river with a velocity of 6
m/s what is the difference in times taken to
cross the river in the shortest path and the
shortest time. The width of the river is 80 m.
3)
-S
Nho
2) 10s
4) 25
·1) 1s​

Answer 1

Answer:

10s

Explanation:

the boat is traveling with an angle = x

boat moves perpendicular to river i.e shortest path

then u= vsinx

6=10sinx

sinx = 3/5

time to cross River=d/vcosx=80×5/10×(4)=10s