Question

Plz solve this step by step i need solution urgently ​

Answer 1

Answer:

Sheet of metal required =440m square

Step-by-step explanation:

Total surface area of the cylinder =2π×r(h+r)

=2×

7

22

×7×(7+3)=44×10=440m square

Sheet of metal required =440m square

Answer 2

Answer:

${\huge{\red{\underline{\underline{Question}}}}}$

• A closed cylindrical tank of radius 7 m and height 3 m is made from a sheet of metal.How much sheet of metal is required?

${\huge{\red{\underline{\underline{Formula\ Used}}}}}$

• Total surface area of cylinder=$(2\pi rh)+(2\pi {(r)}^{2})$

${\huge{\red{\underline{\underline{Answer}}}}}$

${\red{\underline{\underline{Given}}}}$

• Height =3m
• Radius =7m

${\red{\underline{\underline{To\ find}}}}$

• Metal of sheet required to make closed cylindrical tank= Total surface area of cylinder=???

${\red{\underline{\underline{Solution}}}}$

Total surface area of cylinder=

$(2\pi×7×3)+(2\pi ×{(7)}^{2})$

=>$(2\frac{22}{7}×7×3)+(2\frac{22}{7}×49)$

=>$(2×22×3)+(2×22×7)$

=>132+308

=>440${m}^{2}$ metal is required.