A child covers a distance of 40 meters in 2 minutes .What is the speed of the child
Answers
Explanation:
Hope this answer helps you
Answer:
Your question can be solved using two methods.
Explanation:
Proportion method
To take out the speed of the child we must find the distance covered by the child in one hour or 60 minutes.
Minutes : Minutes :: Distance : Distance
2 : 60 :: 40 : x
Product of means = Product of extremes
= 60*40 = 2*x
= 240 = 2x
= 120 = x
(120 m = 0.12 km)
Therefore, the speed of the child is 0.12 kmph.
Unitary Method
Distance covered in 2 minutes = 40m
Distance covered in 1 minute = 40/2 = 20m
Distance covered in 60 minutes or 1 hour = 20*60 = 120m
(120m = 0.12 km)
Therefore, the speed of the child is 0.12 kmph.
(It can also be said that the child covers 0.12 km or 120 m in one hour. )
Note: It isn't important to calculate speed as km per hour. The speed can also be calculated in m per seconds. I have dine it below:
Distance covered is 40m
Time taken is 2m or 120 seconds
Speed = Distance/time = 40/120 = 0.33 m/s
Hence, the speed is 0.33 m per second
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