Question : Two trains P and Q of lengths 320 m and 540 m, respectively, are running in the same direction on parallel tracks at 108 km/hr and 144 km/hr, respectively. How much time will the trains take to cross each other completely?

Option 1: 86 sec

Option 2: 54 sec

Option 3: 32 sec

Option 4: 68 sec

Question : Two men walk from a place at speeds of 9 km/hr and 12 km/hr, respectively. The first man takes 20 minutes more than the second one to cover the journey. Find the distance of the journey.

Option 1: 10 km

Option 2: 13 km

Option 3: 15 km

Option 4: 12 km

Question : Two tourist buses start from the same point and move along two roads at right angles at speeds of 48 km/hr and 36 km/hr, respectively. The distance between the buses after 15 seconds is ________.

Option 1: 175 m

Option 2: 350 m

Option 3: 250 m

Option 4: 150 m

Question : A boat goes a certain distance at 30 km/hr and comes back the same distance at 60 km/hr. What is the average speed (in km/hr) for the total journey?

Option 1: 45 km/hr

Option 2: 50 km/hr

Option 3: 40 km/hr

Option 4: 35 km/hr

Question : Vikas covered a certain distance by bike. If he covers 40% of the distance at 40 km/hr, 50% of the distance at 25 km/hr and the remaining 10% distance at 10 km/hr. Find his average speed over the whole distance.

Option 1: 25 km/hr

Option 2: 28 km/hr

Option 3: 26 km/hr

Option 4: 30 km/hr