Question : A motorist travels to a place 150 km away at an average speed of 50 km/h and returns at 30 km/h. His average speed for the whole journey in km/h is

Option 1: 37.5

Option 2: 37

Option 3: 35

Option 4: 40

Question : Sriya with her family travelled from Bolpur to Suri by car at a speed of 40 km/h and returned to Bolpur at a speed of 50 km/h. The average speed for the whole journey is:

Option 1: $44\frac{4}{9}$ km/h

Option 2: $45$ km/h

Option 3: $45\frac{1}{2}$ km/h

Option 4: $44.78$ km/h

Question : A train 150 m long passes a km stone in 30 seconds and another train, of the same length and travelling in the opposite direction, in 10 seconds. The speed of the second train is:

Option 1: 90 km/h

Option 2: 125 km/h

Option 3: 25 km/h

Option 4: 75 km/h

Question : A truck covers three equal distances of 100 km at the speeds of 200 km/hr, 300 km/hr, and 600 km/hr. Find the average speed of the truck for the whole journey.

Option 1: 250 km/h

Option 2: 300 km/h

Option 3: 366.66 km/h

Option 4: 327 km/h

Question : A train starts from a station $P$ for another station $Q$ at 6 p.m. at an average speed of 75 km/h. Another train starts from station $Q$ for station $\mathrm{P}$ at 8 p.m. at an average speed of 105 km/h. If the distance between these two stations is 690 km, then at what time will the two trains meet?

Option 1: 10:30 p.m.

Option 2: 10 p.m.

Option 3: 11 p.m.

Option 4: 11:30 p.m.