The specific steps are as follows

The surface of a cylinder can be divided into a rectangle and two circles. I think your teacher should have taught you.

The width of a rectangle is equal to the circumference of a circle, and the length is 10dm, so s rectangle =10 *18.84 =188.4dm?

Let's look at the circle again.

The circumference of a circle is 18.84dm, which can be obtained from C=2πr, r≈3.

Is the area of a circle πr? =3. 14*3? =28.26dm？

S cylinder =2*S circle +S rectangle =188.4+28.26 = 216.66 DM?

Cylinder volume:

The volume of a cylinder is equal to the bottom area multiplied by the height.

So V cylinder =S circle *h height =28.26* 10=282.6dm?

Surface area of cuboid:

The surface area of a cuboid is equal to the sum of the areas of six faces.

S cuboid =2*(3*8+3*4+4*8)= 136cm?

Volume of cuboid:

The volume of a cuboid is equal to the product of three sides.

So V cuboid =3*4*8=96cm?

Seek adoption