Question

8. A covering paper of width 4m is used to completely cover 20 cylindrical boxes, each
of base radius 56 cm and height 1.5m. How much length of covering paper will be
required to cover them all?

Answer 1

Answer:

36.256

Step-by-step explanation:

Radius of the cylinder (r) = 56 cm

Height of the cylinder (h) = 1.5 m = 150 cm

So, Surface area of one cylinder = 2 · π · r · (r + h)

$= 2*(22/7) *56 * (56 + 150) cm^2\\= (2 * 22 * 8 * 206) cm^2\\= 72512 cm^2$

Now Area of the paper = Surface area of all cylinders = 20 x 72512 = 1450240 $cm^2$

Hence, Required height = (1450240)/400 = 3625.60 cm = 36.256 m

#Please note that I have found the answer if the two circular ends are also covered. If it helps you, please mark my answer as the brainliest...