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Let the length of train ‘A’ be ‘x’ metres Therefore, length of the goods train = ‘4x’ metres Speed of train ‘A’ = 63 × (5/18) = 17.5 m/s According to the question, 4x + x = 17.5 × 24 => 5x = 420 => x = 84 Therefore, time taken by train ‘B’ to cross train ‘A’ = {(84 + 150)/(24 + 15)} = 6 seconds
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 frequency range of human hearing is approximately:
Which of the following substance produces brisk effervescence when treated with baking-soda solution?
A magnetic force does no work on a moving charged particle because:
The red colour of onion is caused by the presence of which pigment?
Who discovered the neutrons?
Which vitamin is also known as Vitamin-B2?
Which of the following is a compound?
The base of an electric iron is brightly polished mainly -
Humans have _____ lobes in the left lung.