Q.6. A car moves at the speed of 80 km/hr. What is the speed of the car in metres per second ?
Solution:
Q.7. Which of the following trains is the fastest?
Solution:
(A) 25 m/sec
(B) 1500 m/min
(C) 90 km /hr
(D) None of these
And, 25 m/sec = (25×60) m/min = 1500 m/min. So all the tree speed are equal.
Q.8. A man walking at the rate of 5 km/hr crosses a bridge in 15 minutes. The length of the bridge (in metres) is
Solution:
Distance covered in 15 minutes =
Q.9. A car is running at a speed of 108 kmph. What distance will it cover in 15 second ?
∴ Distance covered in 15 sec. = (30 × 15) m = 450 m.
Q.10. A truck covers a distance of 550 metres in 1 minute whereas a bus covers a distance of 33 kms in 45 minutes. The ratio of their speeds is :
Solution:
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