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Let the length of train 'A' be 'd' metres. So, distance covered by train 'A' in 35 seconds = 'd' metres And distance covered by train 'A' in 40 seconds = (d + 120) metres So, distance covered by train 'A' in (40 - 35) i.e., 5 seconds = d + 120 - d = 120 metres So, speed of train 'A' = (120/5) = 24 m/s So, length of train 'A' = 24 X 35 = 840 metres Length of train 'B' = (840/2) = 420 metres So, speed of train 'B' = (420 + 210) ÷ 30 = 21 m/s So, time taken by trains 'A' and 'B' to cross each other = (840 + 420) ÷ (24 + 21) = 1260 ÷ 45 = 28 seconds
The Prime Minister does not act as the chairman for which of the following committees?
Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when:
1. The orbit is g...
In case of miscarriage or medical termination of pregnancy, a woman is entitled to how many weeks of leave with pay?
Which of the following will turn blue litmus red ?
Let n (>1) be a composite natural number whose square root is not an integer.
Consider the following statements:
1. n has a factor wh...
What is the purpose of a compiler in programming?
The principle that suggests recording expenses only when they are realized, and income only when they are certain, is known as:
Who among the following was a great protagonist of the 'Doctrine of Lapse'?
Select the odd number from the given alternatives.
A boat's speed is 13.5 km/h when moving against the current and 18.3 km/h when moving along with the current. Determine the speed of the stream.