Question : Find the surface area of a spherical ball that has a radius of 1.1 cm.
Option 1: 16 cm2
Option 2: 12.1 cm2
Option 3: 11.2 cm2
Option 4: 15.2 cm2
Answer (1)
17th Jan, 2024
Correct Answer: 15.2 cm 2
Solution :
Given: A spherical ball that has a radius of 1.1 cm.
The surface area of the sphere of the radius $r = 4\pi r^2$
$=4\times \frac{22}{7}\times (1.1)^2$
$=4\times \frac{22}{7}\times 1.21=15.2$ cm
2
Hence, the correct answer is 15.2 cm
2
.
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