Find the surface area of a bar of soap if the diameter is 5 cm and the height is 2cm .

Mathematics

2 answers:

Vinil7 [7]2 years ago

7 0

Please see the pic, I'd solved in it.

s2008m [1.1K]2 years ago

5 0

Given that:
Diameter = 5 cm
which means,
Radius= $\frac{diameter}{2}$ = $\frac{5}{2}$ = 2.5 cm (radius is half the diameter)
and Height = 2 cm
We can assume that the shape is cylindrical

Formula of the Surface Area of a Cylinder
=2 $\pi$ r² + 2 $\pi$ rh
=2 $\pi$ (2.5)² + 2 $\pi$ (2.5)(2)
=12.5 $\pi$ + 10 $\pi$
=22.5 $\pi$ cm² (in terms of $\pi$ )
=70.69 cm² ≈ 70.7 cm²

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