1.

Two stations A and B are 110 Kms apart on a straight line.One train starts from A at 7 a.m. and travels towards B at20 km per hour speed. Another train starts from B at 8amand travels towards A at a speed of 25 km per hour. Atwhat time will they meet?

Answer»

dist between two places = 110 kmA cover 20 km till 8am now distance left = 110-20=90 kmnow both coming oppositelyso speed = 20+25= 45 km/h45 km coming in 1 hr 1 km coming in 1/45 hr90 km coming in 90/45= 2hrthey will meet at 8+2= 10am

Suppose they meetxhours after 7 a.m.Distance covered by A inxhours = 20xkm.Distance covered by B in (x- 1) hours = 25(x- 1) km.20x+ 25(x- 1) = 11045x= 135x= 3.So, they meet at 10 a.m.



Discussion

No Comment Found