12. Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted t

1.	12. Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted to obtain 508.68 cm of metal. Find thenumber of discs melted. (Use = 3.14)INCERT Exemplar]
Answer» Step-by-step explanation: radius of metalic DISK= 0.75cm thickness t=0.2 let n disk should be melted so VOLUME of n disk=nπr^2t let l=508.68cm volume of metal=l^3 mass =volume density d* l^3= nπr^2td l^3=nπr^2t n=l^3/(πr^2*t) HOPE it will help you.

12. Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted to obtain 508.68 cm of metal. Find thenumber of discs melted. (Use = 3.14)INCERT Exemplar]

Answer»

Step-by-step explanation:

radius of metalic DISK= 0.75cm

thickness t=0.2

let n disk should be melted

so VOLUME of n disk=n*π*r^2*t

let l=508.68cm

volume of metal=l^3

mass =volume * density

d* l^3= n*π*r^2*t*d

l^3=n*πr^2*t

n=l^3/(πr^2*t)

HOPE it will help you.

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12. Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted to obtain 508.68 cm of metal. Find thenumber of discs melted. (Use = 3.14)INCERT Exemplar]​

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12. Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted to obtain 508.68 cm of metal. Find thenumber of discs melted. (Use = 3.14)INCERT Exemplar]