The formula for the volume and surface area of a sphere will be given to you in the exam, so you will not need to memorise these. \(\text{The volume of a sphere} ~=~ \frac {4}{3} \times \pi \times ...
A hemisphere is half a sphere. Curved surface area of hemisphere = \(\frac{1}{2} \times 4\pi r^2 = \frac{1}{2} \times 4 \times \pi \times 1.5^2\). Total surface area of the salt shaker = \(\pi ...
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