Answer:
9/56
Step-by-step explanation:
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Answer:
I need points because i have a question
Step-by-step explanation:
And i need major help hope u understand also thanks
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.
<span>A.
The surface area of A is greater than the surface area of B.</span>