the area of a square field is 900m square. how much time will a girl take to run 10 times around it at the rate of 6 km/h ?
Answers
Answered by
1
200S IT WILL TAKE TO COVER THAT MUCH DISTANCE
anirudh24377:
Your answer is completely wrong, logically and mathematically.
Do not write an answer if you don't know what you're doing.
Answered by
13
Area = 900m²
=> s² = 900
=> s = √900
=> s = 30 m
Then
Perimeter = 4s = 4 x 30
= 120 m
Distance(d) = 10 x 120=1200 m
Speed ( s) = 6 km/h
= 6000/3600
= 5/3 ms⁻¹
Now
Speed = distance/ time
=> time = distance/ speed
=1200/(5/3)
= 240 x 3
= 720 seconds
or = 12 minutes
=> s² = 900
=> s = √900
=> s = 30 m
Then
Perimeter = 4s = 4 x 30
= 120 m
Distance(d) = 10 x 120=1200 m
Speed ( s) = 6 km/h
= 6000/3600
= 5/3 ms⁻¹
Now
Speed = distance/ time
=> time = distance/ speed
=1200/(5/3)
= 240 x 3
= 720 seconds
or = 12 minutes
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