Acres of Pizzas pizzas are round It is estimated that Americ

Acres of Pizzas (pizzas are round)
It is estimated that Americans eat 100 acres worth of pizza a day. Assume that they are large pizzas with a diameter of 14 inches.

                Find the number of square inches in a large pizza.

                An acre has 43,560 square feet and a square foot has 144 square inches. How many square inches are there in 100 acres?

                How many large pizzas do Americans eat each day?

                If a large pizza has eight slices, estimate how many slices per second American eat.

What is another real world situation in which similar calculations are used?

Solution

the number of square inches in a large pizza. = Area of the circle with diametre 14 inches

= pir^2

= 154 square inches.

----------------------------------------------------------

An acre = 43560 square feet

Hence in 100 acres = 4356000 sq ft =

4356000x144 square inches

= 627,264,000 square inches.

-----------------------------------------------------------

no of pizzas eaten by Americans each day = 627,264,000/154 = 4073143

--------------------------------------------------------

Slices they eat = 4073143x8 = 32585143 slices