Q21. A man travels 600 km by train at 80 km/hr, 800 km by ship at 40 km/hr, 500 km by aeroplane at 400 km / hr and 100 km by car at 50 km / hr What is the average speed for the entire distance ?
A. 8000/123 km/hr
B. 7385/123 km/hr
C. 60 km/hr
D. 62 km/hr
Q22. A boy goes to his school from his house at a speed of 3 km / hr and returns at a speed of 2 km / hr. If he takes 5 hours in going and coming, the distance between his house and school is :
A. 6.5 km
B. 5 km
C. 6 km
D. 5.5 km
Q23. A can complete a journey in 10 hours. He travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.
A. 220 km
B. 224 km
C. 234 km
D. 230 km
Q24. A farmer travelled a distance of 61 km in 9 hours. He travelled partly on foot @ 4 km/hr and partly on bicycle @ 9 km/hr. The distance travelled on foot is :
A. 15 km
B. 16 km
C. 17 km
D. 14 km
Q25. A person has to cover a distance of 6 km in 45 minutes. If he covers one-half of the distance in two-thirds of the total time; to cover the remaining distance in the remaining time, his speed (in km/hr) must be :
A. 12
B. 15
C. 8
D. 6
Q26. Anna left for city A from city B.at 5.20 a.m. She travelled at the speed of 80 km /hr for 2 hours 15 minutes. After’ that the speed was reduced to 60 km / hr. If the distance between two cities is 350 kms, at what time did Anna reach city A ?
A. 9.25 a.m.
B. 9.20 a.m.
C. 10.25 a.m.
D. 9.35 a.m.
Q27. One of the two buses completes a journey of 300 km in  hours and the other a journey of 450 km in 9 hours. The ratio of their average speeds is :
A. 4 : 5
B. 8 : 9
C. 2 : 3
D. 3 : 4
Q28. A car travelling with  of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car.
A. 35 km/hr
B. 25 km/hr
C. 30 km/hr
D. 125/7 km/hr
Q29. Sound is said to travel in air at about 1100 feet per second. A man hears the axe striking the tree,  seconds after he sees it strike the tree. How far is the man from the wood chopper ?
A. 2500 ft
B. 2629 ft
C. 2420 ft
D. 2197 ft
Q30. A motor car starts with the speed of 70 km / hr with its speed increasing every two hours by 10 kmph. In how many hours will it cover 345 kms ?
A. 9/2 hrs
B. 9/4 hrs
C. 7 hrs 15 min
D. 4 hrs 5 min
