Question

solve 3. (ii)(iii)and4. (i)(ii)(iii).

Answer 1

3(ii ) Given
area of circle = 154 cm^2

πr^2 = 154

r^2 = 154 × 7 / 22

r^2 = 49

r = 7 cm

hence, radii = 7cm

3(iii):-. Given

area of circle = 314 whole 2/ 7 mm^2

πr^2 = ( 314×7 + 2 ) / 7

πr^2 = 2200 / 7

r^2 = ( 2200/ 7 ) × ( 7 / 22 )

r^2 = 100

r = 10mm

hence , radii= 10mm

4 (i) :- Given,

area of circle = 2826 m^2

πr^2 = 2826

3.14 × r^2 = 2826

r^2 = 2826 / 3.14

r^2 = 900

r = 30 m

then diameter = 2r

= 2 × 30 = 60m

hence , diameter of circle = 60m

4(ii) :- Given ,

area of circle = 7.065 mm^2

πr^2 = 7.065

3.14 × r^2 = 7.065

r^2 = 7.065 / 3.14

r^2 = 2.25

r = 1.5 mm

now diameter of circle will be = 2r

= 2 × 1.5 = 3 mm

hence, diameter = 3 mm

4(iii ):- Given ,

area of circle = 254.34 cm^2

πr^2 = 254.34

3.14 × r^2 = 254.34

r^2 = 254.34 / 3.14

r^2 = 81

r = √81

r = 9

then diameter of circle will be (D) = 2r

= 2 × 9 = 18 cm

D = 18 cm

hence , diameter of circle = 18 cm

Answer 2

Answer:

answer is 18 CM MARK ME BRAINLIEST