Which is the cost per square inch of a pizza with diameter 20 inches if the cost of the pizza is $16? Be sure to round your answer to the nearest cent.

Question

anonymous · Answer

a. about 1 cent	
	b. about 5 cents	
	c. about twenty-five cents	
	d. about eighty cents

anonymous · Answer

314.16 would be the area of pizza.
So 1600/314.16 = 5.0929456269...
so about 5 cents (B)

anonymous · Answer

A=πr^2  would be your formula for area of a circle.

anonymous · Answer

thank you!

akashdeepdeb · Answer

Cost of the pizza = $16

Now one thing we should know here is that, a pizza is priced on the basis of its size.
So a small pizza may have a lesser price.

Now, the diameter is: 20 inches.

So basically the radius [which is half of a diameter is]: 10 inches.

The area of a pizza [which is circular] would be given by the equation: $\pi * r^2$

So if the $r$ = 10 inches and $\pi$ = 3.14
Then the area is 314 inches$^2$

Now this is the area of the whole pizza.
Price of the whole pizza = $16

Price per unit area = $\frac{16}{314}$/inches^2$

Getting this? :)

anonymous · Answer

so b?

akashdeepdeb · Answer

Yes, in cents it should approximately be 'B'. 
Getting this concept behind it?