1 thought on “a school bus covers a distance of 6km in 0.5 h . Calculate its speed in km/h and m/s”
Step-by-step explanation:
Depending on the need and context, speed is measured in different units. As you already know, the SI unit of speed is metre per second. Another commonly used unit is kilometre per hour (km/h). When we talk about speed of aeroplanes and cars, it would be more appropriate to use km/h than m/s. Let us see how the speed of the school bus (given in Example 1) can be expressed in km/h.
Speed In km/h
Distance travelled by the bus = 7200 m
Distance travelled in kilometres = 7200 ÷ 1000 = 7.2km
Time taken = 1800 s
Time in hours = 1800 ÷ 3600 = O.5h
Therefore, speed of the bus = 7.2 ÷ 0.5 = 14.4 km/h
Speed in m/s can be easily converted to km/h by dividing the answer in m/s by 5/18 or multiplying by 18/5. Do you know how we got this?
Step-by-step explanation:
Depending on the need and context, speed is measured in different units. As you already know, the SI unit of speed is metre per second. Another commonly used unit is kilometre per hour (km/h). When we talk about speed of aeroplanes and cars, it would be more appropriate to use km/h than m/s. Let us see how the speed of the school bus (given in Example 1) can be expressed in km/h.
Speed In km/h
Distance travelled by the bus = 7200 m
Distance travelled in kilometres = 7200 ÷ 1000 = 7.2km
Time taken = 1800 s
Time in hours = 1800 ÷ 3600 = O.5h
Therefore, speed of the bus = 7.2 ÷ 0.5 = 14.4 km/h
Speed in m/s can be easily converted to km/h by dividing the answer in m/s by 5/18 or multiplying by 18/5. Do you know how we got this?
1 km = 1000 m
1 h = 3600 s
1 km/h = 1000 m/3600 s
= 5/18 m/s