1.

1). 10 : 30 AM2). 10 : 00 AM3). 8 : 45 AM4). 9 : 30 AM

Answer»

Assume both trains meet after X hours after 7 am

DISTANCE covered by train starting from P in x hours = 20X KM

Distance covered by train starting from Q in (x - 1) hours = 25(x - 1) km (As it starts at 8 AM)

Total distance between P and Q = 110 km

⇒ 20x + 25(x - 1) = 110

⇒ 45x = 135

⇒ x = 3

∴ They meet after 3 hours after 7 am, i.e., they meet at 10 A.M.



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