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Let the total number of cows = x Total number of chickens = y According to the question, x + y = 50 ........... (i) 4x + 2y = 160 ........... (ii) Multiplying equation (i) by 4 and subtracting (ii) by (i) , we get 2y = 40 y = 20 Hence, the total number of chickens = 20
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A train takes 25 seconds to cross a platform and 5 seconds to cross a pole. If the length of the train is 60 metres less than the length of the platform...
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Train 'M' takes 2 hours less than Train 'N' to travel a distance of 150 km. The speed of Train 'M' is 20 km/h more than that of Train 'N'. What is the t...
A train whose speed is 40 m/s crosses a bridge in 20 seconds. Another train which is 80m shorter than the first train crosses the same bridge at the sp...
Two cars start from a place with a speed of 65 km/hr at an interval of 15 minutes. A man coming from the opposite direction towards the place meets the ...
Two trains, whose respective lengths are 120 metres and 180 metres, cross each other in 15 seconds when they are moving in opposite directions and in 5...
A train with a length of (p + 60) meters takes 30 seconds to cross a platform that is (q + 60) meters long while traveling at a speed of 20 meters per s...
Two trains A and B, were proceeding in the same direction on parallel tracks at 24 km/hr and 78 km/hr respectively. A man noticed that it took exactly 2...
Train A departs from a station at a speed of 195 km/h, 16 hours following the departure of Train B. It takes Train A 10 hours to catch up to Train B. Ca...
