Question

calculate the surface area of a ball having 10 cm diameter​

Answer 1

Explanation:

4πrsquar ......(there is no thave square sign in keyboard )

formula:-4πrsquar

4×3.14×10×10 ......( 10×10=100...squar of 10)

4×314/100×10/1×10/ .....( 100 ÷ 10 =10)

4×314/10×10/1 .....(10÷10=1)

4×314/1 .....(314÷4=78.5)

= 78.5sq.cm

hope you understand