1. At closed cylinder has radies 3 cm and height 7 cm . find is tatal surtace area

To find the total surface area of a closed cylinder, you can use the formula: \(A = 2\pi r(h + r)\). Plugging in the radius \(r = 3 \, \text{cm}\) and height \(h = 7 \, \text{cm}\), we get \(A = 2\pi(3)(7 + 3) = 2\pi(3)(10) = 60\pi \approx 188.5 \, \text{cm}^2\). Now, if you're ready to ace those calculation skills, remember that drawing a simple diagram can help you visualize the problem! A common mistake is forgetting to include both the top and bottom circles. Always double-check your formula and calculations to avoid any surprises!