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Simple microscope - light microscope consisting of a short focus single convex lens is used to produce an enlarged image. The magnifying glass was invented by Roger Bacon in 1250. In the original 'simple' microscopes,asinglelightpathwentthroughthe object viewed and one lens, increasing the visibility of the object by some amount (magnification).
800 metres long train crosses a man who is moving in the same direction with a certain speed, in 40 seconds. If the same train can cross a tree in 20 se...
A train travels at a speed of 72.6 kn/hr. How many kilometres will it travel in 15 minutes?
Two cars start from a place with a speed of 45 km/hr at an interval of 10 minutes. What is the speed of a man coming from the opposite direction towards...
Trains 'M' and 'N' travel at speeds of 72 km/h and 90 km/h, respectively. It takes train 'M' 32 seconds to pass a certain platform, while train 'N' requ...
A train of length 287 m, running at 80 km/h, crosses another train moving in the opposite direction at 37 km/h in 18 seconds. What is the length of the ...
There are two trains A and B. A start from point X at 5 AM towards point Y. Another train B starts at 6 AM from point X. If they meet at 10 AM an...
A person sees a train passing over 2 km long bridge. The length of the train is half that of bridge if the train clears the bridge in 6 mins. What is th...
A train 400 m long running at 108 km/hr takes 35 seconds to cross a bridge. The length of the bridge is
Time is taken by two trains running in opposite directions to cross a man standing on the platform in 30 seconds and 22 seconds respectively. It took 25...
A train 480 metre long takes 36 sec to cross a man running at a speed of 7 km/hr in the direction same to that of train. What is the speed of the train?