SSC (English Medium) Class 8Maharashtra State Board
Share
Notifications

View all notifications

# Areas of Some Circles Are Given Below Find Their Diameters. - SSC (English Medium) Class 8 - Mathematics

Login
Create free account

Forgot password?
ConceptPerimeter and Area of a Circle

#### Question

Areas of some circles are given below find their diameters.
(1) 176 sq cm
(2) 394.24 sq cm
(3) 12474 sq cm

#### Solution

(1) 176 sq cm

Ar = πr²

⇒ 176 = 22/7 xx r²

⇒ r² = (176 xx 7)/22 = 56

⇒ r = sqrt[56]\

d = 2r = 2sqrt[56]

(2) 394.24 sq cm

Ar = πr²

⇒ 394.24 = 22/7 xx r²

⇒ r² = (394.24 xx 7)/22 = 125.44

⇒ r = 11.2

d = 2r = 2 x 11.2 = 22.4 cm

(3) 12474 sq cm

Ar = πr²

⇒ 12474 = 22/7 xx r²

⇒ r² = (12474 xx 7)/22 = 3969

⇒ r = 63

d = 2r = 2 x 63 = 126 cm

Is there an error in this question or solution?

#### APPEARS IN

Balbharati Solution for Balbharati Class 8 Mathematics (2019 to Current)
Chapter 15: Area
Practice Set 15.6 | Q: 2 | Page no. 104
Solution Areas of Some Circles Are Given Below Find Their Diameters. Concept: Perimeter and Area of a Circle.
S