From a solid cylinder of height $30$ cm and radius $7$ cm, a conical cavity of height $24$ cm and same radius is hollowed out. Find the total surface area of the remaining solid.

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Step 1: Slant height of cone $l = \sqrt{24^2 + 7^2} = \sqrt{576 + 49} = \sqrt{625} = 25$ cm
Step 2: TSA $= 2\pi r h + \pi r^2 + \pi r l = \frac{22}{7} 	imes 7(60 + 7 + 25)$
Step 3: $= 22 	imes 92 = 2024$ cm$^2$

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