A steamer is moving due east with 36 km/h.To a man in the steamer the wind appears to blow at 18km/h due north.The speed of the wind is
(A) `5sqrt(5)ms^(-1)`

(B) `5ms^(-1)`

(C) `5sqrt(2)ms^(-1)`

(D) `10ms^(-1)`

A steamer is moving due east with 36km/h .To a man in the steamer the wind appears to blow at 18km/h due north.The speed of the wind is

The height and horizontal distances covered by a projectile in a time t are given by y=(4t-5t^(2)) m and x=3t m the velocity of projection is (A) 4ms^(-1) (B) 3ms^(-1) (C) 5ms^(-1) (D) 10ms^(-1)

11. A boy wants to throw a ball from a point A so as to just clear the obstruction at B. The minimum horizontal velocity with which the boy should throw the ball is (A) 23.5 ms^(-1) (B) 47 ms^(-1) (C) 235 ms^(-1) (D) 32.5 ms^(-1)

An aeroplane is moving horizontally at 30ms^(-1) at a height of 1km towards a target on the ground which is intended to be bombed The velocity with which bomb hits the target is (A) 100ms^(-1) (B) 200ms^(-1) (C) 144.6ms^(-1) (D) 150ms^(-1)

1 km h^(-1) = ______ ms^(-1)

A car is moving towards east with a speed of 25 km h^-1 . To the driver of the car, a bus appears to move towards north with a speed of 25 sqrt(3) km h^-1 . What is the actual velocity of the bus ?

A man rows 40 km upstream in 8 h and a distance of 36 km downstrean in 6 h. Then, speed of the stream is (A) 0.5 km/h (B) 1.5 km/h (C ) 1 km/h (D) 3 km/h

A cyclist is moving due east with a velocity of 10 km h^(-1) . There is no wind and rain appoars to fall at an angle of 10^(@) to the vertical. Calculate the actual speed of the rain.