Question

Arrange the following speeds in descending order.
18 km/hr, 10 ms -1, 1 km/min​

Answer 1

Answer:

1. The order is 18 km/h > 1 km/min > 10 m/s

Explanation:

1. To find the descending order, we must convert those values to values with the same unit (in this case m/s).

2. Thus:

    (a) 18 km/h = 18 X 1000m X 3600s

    (b) 1 km/min = 1 X 1000m X 60s

    (c) 10 m/s does not change as it has correct unit.

3. Comparing these values, we come to the conclusion that the descending order is 18 km/h > 1 km/min > 10 m/s.

Answer 2

18km/hr=18×1000/3600m/s

=5m/s

10m/s=10m/s

1km/min=1×1000/60

=16.67m/s

in descending order:

1km/min>10m/s>18km/hr