Question

Which ia greater : a speed a 54 km/h or a speed of 10.5 m/sec. how much distance travelled by each in 4 seconds.. plzz give the solution with full explanation . answer is given below.

Answer - 54 km/h is greater 60m / 42m ​

Answer 1

Answer:

Step by Step Explanation:

Given:

• speed1 = 54km/h
• speed2 = 10.5m/sec
• Time = 4sec

Note:

• To convert speed from km/h to m/s , shortcut is multiply by 5/18
• To convert speed from m/s to km/h , shortcut is multiply by 18/5

Solution:

As speed of speed1 is in km/h convert it to m/sec

speed1 = 54km/h = 54×5/18 = 15m/sec

hence 15m/sec > 10.5m/sec

hence 54km/h is greater

distance1 = speed1×Time

= 15×4

= 60m

distance2 = speed2×Time

= 10.5×4

= 42m