Question
Two trains running on parallel track with lengths 140 m
and 40 m respectively. When travelling in opposite directions they are observed to pass each other in 10 seconds, but when they are running in the same direction at the rates as before, the faster train passes the other in 20 seconds. Find the speed of the two trains in km per hour.Solution
Let R1 = Relative speed, when moving in same direction = (140 + 40)/20 = 9 m/s R2 = Relative speed, when moving in opposite direction = (140 + 40)/10 = 18 m/s Now, Speed of faster train = (R1+R2)/2 = (9 + 18)/2 = 13.5 m/sec = 13.5 x 18/5 = 48.6 km/hr Speed of slower train = (R2-R1)/2 = (18-9)/2 = 4.5 m/s = 4.5 x 18/5 = 16.2 km/hr
How much has the Indian Cabinet allocated to the Research Development and Innovation (RDI) scheme?Â
The research wing of Uttarakhand forest department inaugrated the biggest aromatic garden of India in ________ district.
Where was the 9th edition of the India International Science Festival inaugurated?
Which institution won the Subhash Chandra Bose AapdaPrabandhanPuraskar 2025 in the Institutional Category?
Recently RBI fines Rs 3 cr on which of the following company for not complying with PPI & KYC norms?
Average CPI inflation during the first five months of 2025 (Jan–May 2025) was:
SEBI has extended the timeline by two years till _________ for compliance with enhanced qualification and experience requirements for investment adviser...
Which three states were the top performers in Category B of the State Mining Readiness Index?
_______ has been conferred with two DigiDhan awards instituted by Ministry of Electronics & Information Technology, Govt. of India, for achieving t...
What was India’s rank in the World Press Freedom Index 2025?
