Correct Answer - Option 2 : 11: 28 a.m.
Given
Distance is = 150 kms
Train P point 9 AM speed at = 40 km per hr
Train Q another points 10 AM speed at = 35 km per hr
Let they meet x hrs after 9 am.
Distance covered by A in x hours = 40x kms
Distance covered by B in (x - 1) hr. = 35 (x - 1) km
Calculation
∴ 40x + 35 (x-1) = 150
⇒ 40x + 35x - 35 = 150
⇒ 75x = 150 + 35 = 185
⇒ x = 185/75
⇒x = 37/15
⇒ x = 2 hour 7/15 minutes {Hence (7/15) × 60 = 28 minuts}
∴ Trains meet at 11: 28 AM