Two trains start from p and q respectively and travel towards each other at a speed of 50km/hr and 40km/hr respectively. By the time they meet, the first train has travelled 1ookm more than the second. The distance between p and q is Select the correct option:	A) 500km	B) 600km	C) 700km	D) 900km	E) 400km
Explanation:   At the time of meeting, let the distance travelled by the second train be x km   Then, distance covered by the first train is (x+100)km   =&gt; x/40 = (x+100)/50 =&gt; 50x = 40x+4000 =&gt; x=400km   so, distance between p and q = (x+x+100)km = 900km   Answer: Option 900km
<result>D</result>
Two trains start from p and q respectively and travel towards each other at a speed of 50km/hr and 40km/hr respectively. By the time they meet, the first train has travelled 1ookm more than the second. The distance between p and q is