engineering recuitment Bihar ITI CAT Mock Test 2025 Quantitative Aptitude Mensuration Solid Figures

What is the total surface area of a cone whose radius is \(\frac{r}{4}\) and slant height is 4l ?

1
4πr(l + r) 
2
\(\pi r\left(l+\frac{r}{4}\right)\)
3
\(\pi r\left(l+\frac{r}{16}\right)\)
4
8πr(l + r) 
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