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Rain is falling vertically downwards wit...

Rain is falling vertically downwards with respect to ground. If a girl running on the ground with speed 3 km/h observes the rain is falling with speed 5 km/h then actual speed of rain is

A

3 km/h

B

4 km/h

C

5 km/h

D

7 km/h

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Knowledge Check

  • A stationary man observes that the rain is falling vertically downwards. When he starts running a velocity of 12 kmh^(-1) , he observes that the rain is falling at an angle 60^(@) with the vertical. The actual velocity of rain is

    A
    `12 sqrt(3)kmh^(-1)`
    B
    `6 sqrt(3) kmh^(-1)`
    C
    `4 sqrt(3)kmh^(-1)`
    D
    `2sqrt(3)kmh^(-1)`

  • Rain is falling vertically downward with velocity 4m//s. A man is moving horizontally with velocity 3 m//s , the velocity of rain with respect to man is

    A
    `5m//s` at an angle `tan^(-1)(4//3)` with horizontal
    B
    `5 m//s` at an angle `tan^(-1)(3//4)` with vertical
    C
    `5m//s` at an angle `tan^(-1)(4//3)` with vertical
    D
    Both `(1)` and `(2)`

  • Rain is falling vertically downwards with a speed of 4 km h^-1 . A girl moves on a straight road with a velocity of 3 km h^-1 . The apparent velocity of rain with respect to the girl is.

    A
    `3 km h^-1`
    B
    `4 km h^-1`
    C
    `5 km h^-1`
    D
    `7 km h^-1`

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