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Start learning 50% faster. Sign in nowThe decibel (dB) is a logarithmic unit that indicates the ratio of a physical quantity (usually power or intensity) relative to a specified or implied reference level. A ratio in decibels is ten times the logarithm to base 10 of the ratio of two power quantities.
160 metre long train ‘A’ can cross a platform of length 120 metres in 16 seconds. If the speed of train ‘B’ is 6 m/s more than that of train ‘...
A train running at 90 km/hr crosses a vertical pole in 5 seconds and a platform in 20 seconds. Determine the length of the platform.
Two cars start from a place with a speed of 50 km/hr at an interval of 12 minutes. What is the speed of a man coming from the opposite direction towards...
Two trains running at the rates of 75 and 60 kmph respectively, On parallel rails in opposite directions, are observed to pass each other in 12 seconds,...
Two trains running in a opposite directions crosses pole in 84s and 57s respectively and they cross each other in 72s. Find the ratio of their speeds?
A train 300 metre long takes 30 sec to cross a man running at a speed of 6 km/hr in the direction opposite to that of train. What is the speed of the tr...
Train X, traveling at a speed of 54 km/hr, crosses another train Y, which is moving in the opposite direction at a speed of 90 km/hr, in 't' seconds. If...
There are two trains A and B. A start from point X at 5 AM towards point Y. Another train B starts at 7 AM from point Y. If they meet at 9 AM and speed ...
Two trains A and B, were proceeding in the same direction on parallel tracks at 23 km/hr and 77 km/hr respectively. A man noticed that it took exactly 1...
