Question

find the radius of the sphere whose surface area is 49 pie sq cm

Answer 1

Answer:

3.5 cm

Step-by-step explanation:

$\text{Surface Area of a sphere} = 4\pi r^2$

According to the question,

Surface area of sphere = 49π cm²

⇒ 4πr² = 49π

⇒ 4r² = 49

$\implies r^2 = \dfrac{49}{4}\\\\\\\implies r = \sqrt{ \dfrac{49}{4} }\\\\\\\implies r = \dfrac{7}{2} = 3.5$

Hence radius of the sphere is 3.5 cm

Answer 2

Answer:

3.5cm is the answer

Step-by-step explanation:

area of sphere is 4pie R sq

49pie= 4pie Rsq

49/4= R sq

under root 49/4= R

7/4=R

3.5=R