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### Grade 8 - Mathematics9.11 Problems on Time and Distance - I

 Distance (d)= Speed(s) * Time(t) If we convert kilometre per hour into metre per sec. we should multiply that with 5/18. If we convert metre per sec. into kilometre per hour we should multiply that with 18/5. Example: If speed is 36 km/hr find the speed in metres per sec.? Solution: = 36*5/18 = 10 m/sec. Directions: Solve the following problems. Also write at least 5 examples of your own.
 Q 1: If speed is 30 m/sec. find the speed in km/hr.?None of these107.5 km/hr.108 km/hr.106 km/hr. Q 2: If speed is 90 km/hr find the speed in metres per sec.?24.5 m/sec.25m/sec.24 m/sec.None of these Q 3: If speed is 63 km/hr find the speed in metres per sec.?17.5 m/sec.17 m/sec.16.5 m/sec.None of these Q 4: If speed is 35 m/sec. find the speed in km/hr.?None of these125.5 km/hr.126 km/hr.125 km/hr. Q 5: If speed is 20 m/sec. find the speed in km/hr.?None of these72.5 km/hr.72 km/hr.73 km/hr. Q 6: If speed is 7 1/2 m/sec. find the speed in km/hr.?26.5 km/hr.26 km/hr.None of these27 km/hr. Q 7: If speed is 24 m/sec. find the speed in km/hr.?None of these86.4 km/hr.86 km/hr85 km/hr Q 8: If speed is 17 m/sec. find the speed in km/hr.?62 km/hr.61 km/hr.62.2 km/hr.61.2 km/hr. Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!