Question : The effective speed of a boat is 15.2 km/h against the stream and 20.8 km/h along the stream. Find the speed of the stream.

Option 1: 18 km/h

Option 2: 1.8 km/h

Option 3: 2.8 km/h

Option 4: 4.3 km/h

Question : Direction: A train runs for 2 hrs at the speed of 40 km/h and then runs for 4½ hrs at the speed of 6 km/h and then runs for 3½ hrs, at the speed of 70 km/h. Find the average speed of the train.

Option 1: 59.5 km/h
 

Option 2: 80 km/h

Option 3: 56.87 km/h

Option 4: 57.1 km/h

Question : The SI unit of acceleration is ______.

Option 1: m²/s

Option 2: m²/s²

Option 3: m/s

Option 4: m/s²

Question : A thief seeing a policeman from a distance of 300 m starts running at a speed of 10 km/h. The policeman gives chase immediately at a speed of 12 km/h and the thief is caught. What is the distance run by the thief?

Option 1: 2 km

Option 2: 2.5 km

Option 3: 3.2 km

Option 4: 1.5 km

Question : A passenger train running at the speed of 80 km/h leaves the railway station six hours after a goods train leaves and overtakes it in four hours. What is the speed of the goods train?

Option 1: 32 km/h

Option 2: 50 km/h

Option 3: 45 km/h

Option 4: 64 km/h