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Surface Areas and Volumes — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsSurface Areas and Volumes1 Mark
MCQ
Given that the surface area of a spherical shot put is 616cm2 its diameter is:
  • A
    12cm.
  • B
    18cm.
  • C
    16cm.
  • D
    14cm.
✓

Answer

  1. 14cm.

Solution:

Given,

Surface area of sphere $=4\pi\text{r}^2=616$

$4\times\frac{22}{7}\times\text{r}^2=616$

$\text{r}^2=49$

$\text{r}=7\text{cm}$

So diameter = 2 × 7 = 14cm

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