A car reached Raipur from Somgarh in 35 min With an average

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A car reached Raipur from Somgarh in 35 min With an average speed of 69 km/h. If the average speed is increased by 36 km/h, how much time will it take to cover the same distance ?

1. 24 min
2. 27 min
3. 23 min
4. 29 min
5. None of the above

Correct Option: C

Distance between Raipur and Somgarh
= Average speed x Time
= 69 x 35/60= 161/4 km
New speed = (69 + 36) km/h = 105 km/h
∴ Time = Distance/ Speed = 161/4 x 105 h
= 161 x 60/4 x 105min = 23 min