It is given that the circumference of the circle is 19.5 inches. Let the diameter is d inches .
And the formula of circumference is

Substituting the value of C, we will get

When the diameter increased by 3, then the circumference is

And the circumference , when diameter is increased by 3 is 29 inches .
Answer:
See picture above
Explanation:
Hope this helps and have a nice day
1/10 of 800 = 80
1/10 of 50 = 5
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