Find the surface area of each geometric solid

500 sq in. & 9478.85 sq. cm

Step-by-step explanation:

Given:

Cuboid,

l = 15 in.

b = 10 in.

h = 4 in.

Cylinder,

r = 26 cm

h = 32 cm

To Find:

Surface Area = ?

Solution:

Surface area of cuboid = 2(lb + bh + lh)

Surface area of cuboid = 2{15(10) + 10(4) + 15(4)}

Surface area of cuboid = 2(150 + 40 + 60)

Surface area of cuboid = 2(250)

Surface area of cuboid = 500 sq in.

Surface area of cylinder = 2x pi x r( r + h)

Surface area of cylinder = 2 x 22 x 26(26 + 32) / 7

Surface area of cylinder = 2 x 22 x 26 x 58 / 7

Surface area of cylinder = 9478.85 sq. cm

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reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.