CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

2. Find the radius and circumference of a circle, whose area is :

(i) 154 cm2 (ii) 6.16 m2


Solution

Area of circle =154cm2

πr2=154

r2=154π

r2=15422×7

r2=7×7

r =7 cm

circumference =2πr

=2×227×7

=44 cm

Hence 7 cm; 44 cm 

(ii)Area of circle =6.16m2

πr2=6.16

227r2=616100

r2=616100×722

r2=196100

r2=1.96

r=1.96

r=1.4 m

Circumference =2πr

=2×227×1.4

=8.8 m

1.4m; 8.8 m


Mathematics
Concise Mathematics
Standard VIII

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
Same exercise questions
View More


similar_icon
People also searched for
View More



footer-image