Question

A man can swim in still water at 10 kmph the river flows at 5 kmph if he crosses the river in the shortest time his resultant velocity

Answer 1

Explanation:

Given A man can swim in still water at 10 kmph the river flows at 5 kmph if he crosses the river in the shortest time his resultant velocity

• We know that resultant velocity is √V2^2 + V1^2
•                                                      = √10^2 + 5^2
•                                                         =  √100 + 25
•                                                               =  √125
•                                                            = √25 x 5                                                
•                                                        = 5 √5 kmp/hr