Question

5. A rod has a length of 8.9 m and a radius of 2.543 m. Express its surface area and volume
upto the appropriate significant figures​

Answer 1

Answer:

surface area = 182.75

surface volume = 180.72

Explanation:

here length, l = 8.9 m

radius, r = 2.543 m

surface area =

$2\pi {r}^{2} + 2\pi{r} l$

= 2×3.14×2.543×2.543+ 2×3.14×2.543×8.9

= 182.745168

= 182.75

surface volume =

$\pi r {}^{2} l$

= 3.14×2.543×2.543×8.9

= 180.722562

= 180.72