After repairing a scooter runs at a speed of 54 km/h and before repairing runs at speed of 48 km/h. It covers a certain distance in 6 hours after repairing. How much time will it take to cover the same distance before repairing?1). 6 hours 15 minutes2). 6 hours 45 minutes3). 7 hours4). 7 hours 30 minutes