Question

5. If the radius of a cylinder is 4cm and height is 10cm, then total surface
area of cylinder is: *
O a) 440 sq.cm
b) 352 sq.cm
O c) 400 sq.cm
d) 412 sq.cm

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Answer 1

option B is correct

area of cylinder=2πr(h+r)

2×22/7×4(10+4)

44×4/7(14)

176(2)

352cm²

Answer 2

$\huge{\underline{\boxed{\boxed{\red{\mathcal{QUESTION:}}}}}}$

If the radius of a cylinder is 4cm and height is 10cm, then total surface  area of cylinder is:

1. 440 cm²
2. 352 cm²
3. 400 cm²
4. 412 cm²

$\huge{\underline{\boxed{\boxed{\red{\mathcal{ANSWER:}}}}}}$

$\star{\bf{\blue{\underline{Given:}}}}$

• Radius of cylinder = 4 cm
• Height of cylinder = 10 cm

$\star{\bf{\blue{\underline{To\;Find:}}}}$

• Total surface area of Cylinder.

$\star{\bf{\blue{\underline{Formula\;used:}}}}$

• Total surface area of Cylinder = 2πr(r + h)

Now, put the value in the formula,

⇒ Total Surface area of cylinder = 2πr(r + h)

⇒ Total Surface area of cylinder = 2 × 3.14 × 4(4 + 10)

⇒ Total Surface area of cylinder = 25.12 × 14

⇒ Total Surface area of cylinder = 351.68 or 352 cm² (Approx)

Hence, Correct option is B, 352 cm².