Question
Aman goes from his home to his office at a speed of 30
m/s and returns at 50% more speed. If the distance between his home and office is 1,800 metres, then find the average speed of the entire journey.Solution
The speed by which the man returns to his home from his office = 1.5 x 30 = 45 m/s Time taken by the man to reach his office = (1800/30) = 60 seconds Time taken by the man to return to his home from office = (1800/45) = 40 seconds Average speed = [(Total distance) /(Total time) ] = [(2 x 1800) /(60 + 40) ] = (3600/100) = 36 m/s
The Amrita Devi Bishnoi Wildlife Protection Award is given in the memory of Amrita Devi Bishnoi, who sacrificed her life along with 363 others for the p...
Starting from a stationary position, Rahul pedals his bicycle to attain a velocity of 6 ms⁻¹ in 30 s. Then he applies brakes such that the velocity o...
The pressure at the bottom of a liquid column depends on:
To measure the speed of an approaching car a police officer shines –
A metal sphere is heated. Which property remains unchanged?
What is the chemical formula for water?
Which of the following can be beaten into thin sheets?
The storage battery of a car has an emf of 15 V. If the internal resistance of the battery is 0.5 Ω, what is the maximum current that can be drawn from...
Kindly Study the following questions carefully and choose the right answer.
Human saliva contains an enzyme called salivary amylase that breaks...
Relevant for Exams:
