(07.05 HC)
1 answer:
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Answer:
AREA:
CIRCUMFERENCE:
Step-by-step explanation:
The formula that is used to calculate the area of a circle is:
Where "r" is the radius of the circle.
The formula for calculate the circumference of a circle is:
Where "r" is the radius of the circle.
Then, you need to find the radius. This is:
Substituting the radius, you get that the area and the circumference are:
AREA:
CIRCUMFERENCE:
Find the rate in which both balls make one full rotation around the track.
Ball A:
It takes 30 seconds for Ball A to make a full rotation.
Ball B:
It takes 20 seconds for Ball B to make a full rotation.
Find the least common multiple of 20 and 30 to find the time at which they'll meet.
Multiples of 20: {20,40,60}
Multiples of 30: {30,60}
60 is the least common multiple of both 20 and 30.
The balls will meet again at 60 seconds.
Ball A:
It takes 30 seconds for Ball A to make a full rotation.
Ball B:
It takes 20 seconds for Ball B to make a full rotation.
Find the least common multiple of 20 and 30 to find the time at which they'll meet.
Multiples of 20: {20,40,60}
Multiples of 30: {30,60}
60 is the least common multiple of both 20 and 30.
The balls will meet again at 60 seconds.