ye road pr kya hota h or kese kaam karta h ? #science #shorts

A person walks on a straight road from his home to a market 3 km away with a speed of 5 km/h. Finding market closed, he instantaneously turns and walks back with a speed of 6 km/h. The magnitude of average velocity is

Radius of the curved road on national highway is r. Width of the road is l. The outer edge of the road is raised by h with respect to the inner edge so that a car with velocity v can pass safely over it. The value of h is

The radius of the curved road on a national highway is R . The width of the road is b . The outer edge of the road is raised by h with respect to the inner edge so that a car with velocity v can pass safe over it. The value of h is

A car travelling with a velcity of 60 km h^(-1) on a straight road is ahead of a motor cycle travelling with a speed of 76 km h^(-1) . How would the relative velcity be alterd if motor cucle is ahead of car?