Solve the following questions :
If the truck traverses the 10km distance AB in 10 minutes, BC in 20 minutes and CD in 30 minutes , then
velocity for the distance AB in km/hr = (10 km / 10 minutes) = (60 km / 60 minutes) = 60 km/hr :
Now deduce the velocities for the distances BC and CD .

Solve the following questions. (ii) A train travels 360 km with uniform speed. The speed of the train is increased by 5 km//hr , it takes 48 minutes less to cover the same distance. Find the initial speed of the train.

Find r.m.s velocity of three molecules having velocities 10 km//s , 20 km//s , 30 km//s .

Solve the following questions : A bus covers the distance of 100 km between its starting point at depot and the first bus stop in 2 hours , the distance of 80km between two bus stops in one and half hours and the distance of 120 km between second bus stop and its destination point in two and half hours , what is the average velocity of the bus if it has moved in straight line throughout the journey ?

A car takes 20 minutes to cover a distance of 94 km. Find its speed in m/s .

Hot water cools from 60^@C to 50^@C in the first 10 minute and to 42^@C in the next 10 minute The temperature of the surrounding is

A car travels at a speed of 50 km/hr for 30 minutes, at 30 km/hr for next 15 minutes and then 70 km/hr for next 45 minutes. What is the average speed of the car?

The speed of a car is 60 (km)/(hour) . Find the distance covered by the car in 10 minutes,

The speed of boat is 5 km/hr in still water. It crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of the river water is

A car travels at a speed of 50 km//hr for 15 minute and then 70 km//hr for next 45 minutes. What is the average speed of the car?

An observer standing at the sea coast observes 54 waves reaching the coast every minute. If the wave number is 10//metre , the wave velocity is