Question

circular discs 5mm thick ness , are placed one above the other to form a cylinder of cured surface area 462cm square . find the number of discs, if the radius is 3.5cm



dont spam ✖️✖️

no google answers ​

Answer 1

Answer:

Circular discs 5 mm thickness, are placed one above the other to form a cylinder of curved surface area 462 sq cm. if the radius is 3.5 cm.

As per given the thickness of disc =5mm= 0.5cm

Radius of disc =3.5 cm

Curved surface area of cylinder =462 sq cm

∴2πr=462cm

Let number of discs are x

The height of cylinder =h= thickness of disc ×number of discs =0.5x

∴2πr=2× 22/7 ×3.5×05x

From equation (1) and (2) we get

∴2πr=2× 22/7 ×3.5×05x=462

x= 462 × 7 / 2×22×3.5×0.5

=42 discs

Step-by-step explanation:

Mark as Brainliest