The area of a circular plate is 77.5cm² , what is the diameter of the plate.The answer is given 7 cm.
Answers
QuestioN :
The area of a circular plate is 77.5cm² , what is the diameter of the plate. The answer is given 7 cm.
GiveN :
- The area of a circular plate = 77.5cm².
To FiNd :
The diameter of the circular plate
ANswer :
The diameter of the circular plate is 9.92cm
SolutioN :
The area of a circular plate = 77.5cm²
As we know that,
Area of circle = πr²
Subsitute the required values,
77.5 = 22/7 × r²
r² = 77.5 × 7/22
r² = 542.5/22 = 24.65
r = 4.96
Now , finding the diameter of the plate
Therefore,
Diameter = 2 × r
Diameter of the circular plate = 9.92cm
∴Hence, The diameter of the circular plate is 9.92cm.
________________________
Answer:
The area of a circular plate = 77.5cm²
As we know that,
Area of circle = πr²
Subsitute the required values,
77.5 = 22/7 × r²
r² = 77.5 × 7/22
r² = 542.5/22 = 24.65
r = 4.96
Now , finding the diameter of the plate
Therefore,
Diameter = 2 × r
Diameter of the circular plate = 9.92cm