Question

anyone please solve...​

Answer 1

αnswers:-

Given:-

Rectangular rotated strip = 5cm × 25cm.

Need To Find:-

Total surface area of the rectangular rotated strip.

Solution:-

Clearly, the solid thus generated will be a right circular cylinder having 25 cm.

∴ radius (r) = 5cm and height (h) = 25cm

Total surface area of cylinder generated

= 2πr (h+r)

$= 2 \times \frac{22}{7} \times 5 \times (25 + 5)$

$= \frac{220 \times 30}{7} {cm}^{2}$

$= 942.86 \: {cm}^{2}$

Answer 2

Answer:

sorry I don't know your questions answer