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11 . With a uniform speed, a car covers the distance in 8 hours. Had the speed been increased by 4km/hr, the same distance could have been covered in 15/2 hours. What is the distance covered ?
A. 600km B. 400km
C. 520km D. 480km

12 . The speeds of A and B are in the ratio 3 : 4. A takes 20min more than B to reach a destination. In what time does A reach the destination ?
A. 4/3 hours B. 3hours
C. 2hours D. 5/3 hours

13 . A car covers a distance of 816kms in 12 hours. What is the speed of the car?
A. 62km B. 58km
C. 68km D. 52km

14 . Raman droves from home to a neighbouring town at a speed of 50km/hr and on his returning journey. He drove at a speed of 45km/hr and also took an hour longer to reach home. what distance did he cover
A. 450km B. 400km
C. 350km D. 500km

15 . A man takes 6 hours and 35 minutes in walking to a certain place and riding back. He would have taken 2 hours less by riding both ways. What would be the time he would take to both ways ?
A. 4hours and 35 minutes
B. 8hours and 35minutes
C. 10hours
D.  8hours and 45minutes