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### High School Mathematics4.13 Surface Area of a Sphere - I

 Example: Find the surface area of the sphere of radius 7 cm. Solution: Surface area of the sphere = 4 * pi * r2 Given that, r = 7 cm. Area = 4 * 22/2 * 7 * 7 = 616 Sq. cm. Directions: Solve the following problems. Also write at least 5 examples of your own.
 Q 1: Find the surface area of the sphere of radius 19.6 cm.4819.44 Sq. cm.None of these4839.44 Sq. cm.4829.44 Sq. cm. Q 2: Find the surface area of the sphere of radius 25.2 cm.7983.38 Sq. cm.7983.36 Sq. cm.7983.83 Sq. cm.7983.63 Sq. cm. Q 3: Find the surface area of the sphere of radius 44.1 cm.24494.4 Sq. cm.24449.04 Sq. cm.24449.4 Sq. cm.24494.04 Sq. cm. Q 4: Find the surface area of the sphere of radius 10.5 cm.1380 Sq. cm.1382 Sq. cm.1384 Sq. cm.1386 Sq. cm. Q 5: Find the surface area of the sphere of radius 3.5 cm.154 Sq. cm.158 Sq. cm.152 Sq. cm.156 Sq. cm. Q 6: Find the surface area of the sphere of radius 4.2 cm.None of these221.72 Sq. cm.221.76 Sq. cm.221.74 Sq. cm. Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!

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