MCQ
The surface area of a sphere of radius $3.5\ cm$ is:
- ✓$154\ cm^2$
- B$164\ cm^2$
- C$120\ cm^2$
- D$77\ cm^2$
✓
Answer
Correct option: A.
$154\ cm^2$
Given $r = 3.5\ cm$
Surface area of sphere $=4\pi\text{r}^2$
$=4\times\frac{22}{7}\times3.5\times3.5$
$=154\text{cm}^2$
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