[" 21.A plane is travelling eastward at a speed of "500kmh^(-1)" .But "a90kmh^(-1)" wind is "],[" blowing southward.What is the direction and speed of the plane relative to the "],[" ground? "]

A plane is travelling eastward at a speed of 500 kmh^(-1) . But a 90 km h^(-1) wind is blowing southward. What is the direction and speed of the plane relative to the ground ?

A plane is travlling eastward at a speed of 400 km h^)-1) . Wind is blowing southward at a speed of 80 km h^(-1) What is the direction of the place relative to the ground ?

A man swins in a river with and against water at the rate of 15 kmh ^(-1) and 5 kmh^(-1) . Find the man's speed in still water and the speed of the river.

A Jet airplane travelling at the speed of 500kmh^(-1) ejects its products of combustion at the speed of 1500kmh^(-1) relative to the jet plane.What is the speed of the latter with respect to an observer on the ground?

A jet airplane travelling at the speed of "500kmh^(-1)" jets its products of combustion at the speed of 1500kmh^(-1)relative to thejet plane what is the speed of the latter with respect to an observer on the ground

A person travelling eastward with a speed of 3 kmh^(-1) finds that wind seems to blow from north. On doubling his speed, the wind appears to flow from north-east. Find the magnitude of the actual velocity of the wind.

A motorcyclist covers 1/3 of a given distance with a speed of 10 kmh ^(-1) , the next 1/3 at 20 kmh ^(-1) and the last 1/3 at of 30 kmh^(-1). What is the average speed of the motorcycle for the entire journey ?

A jet airplance travelling at the speed of 500 km ^(-1) ejects its products of combustion at the speed of 1500 km h^(-1) relative to the jet plane. What is the speed of the later with respect to observer on the ground ?