Question
Find the slant height
✓
Answer
$\begin{aligned} & r=12 \mathrm{~cm}, h=16 \mathrm{~cm} \\ & l^2=r^2+h^2 \\ \therefore & l^2=(12)^2+(16)^2 \\ \therefore & l^2=144+256 \\ \therefore & l^2=400 \\ \therefore l & =20 \mathrm{~cm}\end{aligned}$
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