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Let the first natural number be N. According to the question, N + (N + 1) + (N + 2) + (N + 3) + (N + 4) = 14 x 5 5N + 10 = 70 5N = 60 N = 60/5 N = 12 The sum of the seven numbers N+ (N+1) + (N+2) + (N + 3) + (N + 4) + (N+5) + (N + 6) =7N + 21 =7 x 12 + 21=105 Average of the seven numbers = 105/7 = 15 The average of the seven numbers if the next two natural numbers are also included will be 15.
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?
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A train 200 m long running at 54 km/hr takes 40 seconds to cross a bridge. The length of the bridge is
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Time is taken by two trains running in opposite directions to cross a man standing on the platform in 30 seconds and 20 seconds respectively. It took 24...
A train of length ‘x’ m crosses a ‘x + 360’ m long platform in 60 seconds. If the train crosses a tree in 18 seconds, then find the value of ‘...
A person sees a train passing over 5 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...
Two poles are positioned at a certain distance from each other. A train traveling at a speed of 90 km/hr passes the first pole in 5 seconds and reaches ...
