The total areas of five coasters are 192 square centimeters, if the diameter of a coaster is 7 centimeter.
Step-by-step explanation:
The given is,
The diameter of a coaster is 7 centimeters
Step:1
Formula to calculate the area of circle,
[tex]Area, A =\pi r^{2}[/tex]........................(1)
Where, r - Radius of circle
From given,
Diameter, d = 7 centimeters
Formula for radius,
[tex]Radius, r = \frac{d}{2}[/tex]
[tex]=\frac{7}{2}[/tex]
= 3.5
Radius, r = 3.5 centimeters
Equation (1) becomes,
[tex]A= \pi (3.5)^{2}[/tex]
[tex]= (3.14)(12.25)[/tex] (∵[tex]\pi =3.14[/tex] )
A = 38.465 square centimeters
Step:2
Area of five coasters,
= No. of coasters × Area of a coaster
= (38.465 × 3.14 )
= 192.325
≅ 192 square centimeters
Result:
The total areas of five coasters are 192 square centimeters, if the diameter of a coaster is 7 centimeter.
Answer: 192.33
Step by step explanation:
The original number would be 192.325 and rounding that to the nearest hundred would be 192.33. I hope this helps!
