Question
A train travels from Station A to Station B at a speed
of 60 km/h and returns from Station B to Station A at a speed of 40 km/h. If the distance between the two stations is 120 km, find the average speed of the train for the entire journey.Solution
Let the distance between the two stations be 120 km. Time taken to travel from A to B = 120/60 = 2 hours. Time taken to travel from B to A = 120/40 = 3 hours. Total time taken for the round trip = 2 + 3 = 5 hours. Total distance traveled = 120 + 120 = 240 km. Average speed = 240/5 = 48 km/h.
What is the wavelength of visible spectrum?
A stone of mass 0.3 kg tied to the end of a string is whirled round in a circle of radius 1.2 m with a speed of 20 rev./ mim in a horizontal plane. Wha...
The velocity of heat radiation in a vacuum is?
Which of the following statement is correct?
I. The incident ray, the normal at the point of incidence and the reflected ray all lie in the sa...
The potential inside a charged hollow sphere is __________.
Which of the following electromagnetic waves are used for detection like Geiger tubes?
The time period of a simple pendulum depends on — Â
A person throws a ball from ground level at speed u and angle θ. The ball reaches maximum height H and range R. What is the ratio H/R?
In a diatomic gas at ordinary temperatures, how many degrees of freedom contribute to internal energy?
Which of the following waves require a medium to travel? Â
Relevant for Exams:
