19. The diameter of a round dinner plate is 10 inches. What's the area of the plate? A. 39.25 inches B. 314 square inches C. 39.25 square inches D. 78.5 square inches
Question
- The diameter of a round dinner plate is 10 inches. What's the area of the plate? A. 39.25 inches B. 314 square inches C. 39.25 square inches D. 78.5 square inches
Solution
The area of a circle is calculated using the formula πr², where r is the radius of the circle.
Step 1: The diameter of the plate is given as 10 inches. The radius is half of the diameter, so the radius of the plate is 10/2 = 5 inches.
Step 2: Substitute the radius into the formula for the area of a circle.
Area = πr² = π(5 inches)² = π(25 square inches) = 78.5 square inches.
So, the correct answer is D. 78.5 square inches.
Similar Questions
Question 9 of 25A pizza with a diameter of 18 inches is cut into 10 equal slices. To the nearest square inch, what is the area of each slice of the pizza?A.8 in2B.25 in2C.6 in2D.51 in2
Two circular plates have radii 12 cm12 cm and 13 cm13 cm. Find the difference in their area correct to two decimal places.
A pizza with a diameter of 24 inches is cut into 16 equal slices. To the nearest square inch, what is the area of each slice of the pizza?A.57 in2B.28 in2C.5 in2D.9 in2SUBMITarrow_backPREVIOUS
The legs of a right triangle measure 10 inches and 4 inches. What is the area of the triangle?A.10 sq. inchesB.80 sq. inchesC.20 sq. inchesD.40 sq. inches
What is the area of a regular decagon having an apothem of 20 m and a side length of 13 m?Question 55Select one:a.3077.7 m2b.2600 m2c.30777 m2d.1300 m2
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.