Given,Weight of copper wire = 13.2 kg = (13.2×1000) gmDiameter of wire = 4mmSo, radius of wire = Weight of 1 cm3 wire = 8.4 gmLet length of wire = h cmSo, volume ×8.4 = 13.2×1000= πr2h×8.4 = 13.2×1000= = h =

Q. 314.6( 9 Votes )

Find the length o

Class 9th RD Sharma - Mathematics 19. Surface Area and Volume of a Right Circular Cylinder

Answer :

Given,

Weight of copper wire = 13.2 kg = (13.2×1000) gm

Diameter of wire = 4mm

So, radius of wire =

Weight of 1 cm³ wire = 8.4 gm

Let length of wire = h cm

So, volume ×8.4 = 13.2×1000

= πr²h×8.4 = 13.2×1000

= h =

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