Two cubes each of $15 \mathrm{cm}$ edge are joined end to end. Find the surface area and volume of the resulting cuboid.

Find the total surface area and volume of the cylinder if circumference of the base$=88 \mathrm{cm}$ and the height$=26 \mathrm{cm}$.

Find the total surface area and volume of the cylinder if area of the base$=346.5 {\mathrm{cm}}^2$ and height$=24.5 cm$

In a colony, there are $1000$ lamp posts cylindrical in shape. The diameter of each post is $35 \mathrm{cm}$ and height is $3 \mathrm{m}$. Find the total cost of painting the curved surface area of all the lamp posts at the rate of $₹ 15$ per $\mathrm{square} \mathrm{meter}$.