ScienceClass 7CBSE
Q
A bus travels 54 km in 90 minutes. The speed of the bus is (a) 0.6 m/s (b) 10 m/s (c) 5.4 m/s (d) 3.6 m/s
A
Soln:
Answer is (b) 10 m/s
Explanation:
Speed = Distance / Time
Distance = 54km = 54 x1000 = 54000m
Time = 90 minutes = 90×60= 5400s
Speed = 54000/5400 = 10 m/s