Question

Please explain it properly
I need the steps correctly

Answer 1

Answer:

a part

1. Radius = 10 cm then diameter will be = 2 × radius

= 20cm

2. Circumference = 2×22/7×radius

= 2×22/7×10

= 62.85 cm

3. Area = 22/7×r²

= 22/7×10²

= 22/7×10×10

= 314.28cm²

Do all the parts same like a part

Answer 2

(a) given,radius=10cm

therefore,diameter=2r

=2*10

=20cm

circumference=2πr

=2*22/7*10

=440/7

=62.85m

area=πr*r

=22/7*10*10

=2200/7

=314.28msquar

(b) given,diameter=3.6m

therefore,radius=d/2

=3.6/2

=1.8m

circumference=2*22/7*1.8

=44/7*1.8

=11.31m

area=22/7*3.24

=10.18msquar

(c) given, circumference=176mm

therefore, circumference=2πr

176 =2*22/7*r

r=(176*7/22*2)

r=4*7

r=28mm

diameter=2r

=2*28

=56mm

area=22/7*28*28

=22*4*28

=616*4

=2464mmsquar

(d) given,area=616cmsquar

therefore,area=πr*r

616=22/7r*r

r=√(616*7/22)

r=√28*7

r=√196

r=14cm

circumference=22/7*2*14

=22*2*2

=88cm

diameter=2r

=2*14

=28cm