What is the approximate area of a circle show below?

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?