George while driving along the highway saw road markers which are at equal distances from each other. He crosses the markers every 20 seconds. If he increases his speed by x meters per second, he crosses the markers at every 15 seconds. But if he increases his speed by y meters per second, he crosses the marker at every 10th second. If y-x = 40 meters per second, then what is the distance between two markers.  Choose the most appropriate option: A) 2377 B) 2788 C) 1200 D) 2778 E) 2211
Let speed be =z m/s then Distance= 20z m   (z+x)15=20z; (z+y)10=20z   Also given that y - x = 40   solving we get 20z=1200   Answer:1200
<result>C</result>
George while driving along the highway saw road markers which are at equal distances from each other. He crosses the markers every 20 seconds. If he increases his speed by x meters per second, he crosses the markers at every 15 seconds. But if he increases his speed by y meters per second, he crosses the marker at every 10th second. If y-x = 40 meters per second, then what is the distance between two markers.