Question

the capacity of a closed cylindrical vessel of height 1m is 15.4 litres. how many square meters of metal sheet would be needed to make it???​

Answer 1

Answer:

Answer. =0.0154 m sq. so,r2h=0.0154 m sq. =0.4708 m sq

Answer 2

The volume of cylinder is

$\pi {r}^{2} h = 15.4$

$\frac{22}{7} \times {r}^{2} \times 1 = 15.4$

${r}^{2} = \frac{107.8}{22} = 4.9$

$r = 2.213$

Total metal used is (Surface area of cylinder)

$2\pi \: rh = 2 \times \frac{22}{7} \times 2.213 \times 1$

Metal Used = 13.91 sq. m (≈ 14 sq.m)