Consider a circle that ha a circumference of 28π centimeters.

A) What is the area in cm^2, of this circle
B) What would be the measure of the radius, in cm, of a circle with an area that is 20% greater than the circle in part A?

Question

Consider a circle that ha a circumference of 28π centimeters.

A) What is the area in cm^2, of this circle
B) What would be the measure of the radius, in cm, of a circle with an area that is 20% greater than the circle in part A?

anonymous · Answer

@563blackghost

anonymous · Answer

@AYE_MY_PEEPS or @Directrix

faiqraees · Answer

Okay so the circumference = 28π
28π = 2πr
Work out the radius and then substitute it in the equation
Area = πr²

faiqraees · Answer

For B part 
Area of Bigger circle = 1.2 x Area of smaller circle
Work out the area of bigger circle and then substitute it again in the area equation to work out the radius of bigger circle
Area of bigger circle = πr²

anonymous · Answer

part a would be, A=196π right?

palwandew · Answer

Yes but multiply the value of pi with 196.

anonymous · Answer

oh, ok!

faiqraees · Answer

I would advise you to not to do it since in the question they are representing numbers with pi and not multiplying it

palwandew · Answer

@FaiqRaees  you are right.