Saved Bookmarks
| 1. |
A boat is sent across the river with a velocity of 8 km/h. in a direction perpendicular to flow of river. If resultant velocity of boat is 10 km/h, then velocity of river flow is : |
|
Answer» 18 km/h  Let velocity of river flow =u and RESULTANT velocity of boat w.r.t. river flow = `v_(r)` `:.` From FIG. `v_(r)^(2) =v_(b)^(2) + u^(2)` `:. U=sqrt(v_(r)^(2) -v_(b)^(2))=sqrt(100-64)=6kmh^(-1)` |
|