Question

please answer this question step by step and get brainliest

Answer 1

Answer:

Step-by-step explanation:

Given:

Diameter of the pencil =7mm

Radius of the pencil (R) = 7/2mm

Diameter of the graphite cylinder =1mm

Radius of the graphite(r) = 1/2mm

Height(h)=14cm= 140mm

[1cm= 10 mm]

Volume of a cylinder= πr²h

Volume of graphite

cylinder = πr2h = 22/7 ×1/2 × 1/2 ×140

Volume of graphite

= 110 mm³

 

Volume of pencil

= πR²h

 = 22/7 ×7/2 × 7/2 ×140

= 490×11= 5390 mm²

Volume of pencil=5390mm³

 

 Volume of

wood = Volume of pencil - Volume of graphite

 Volume of wood= 5390- 110= 5280 mm³

= 5280/1000= 5.28

cm³

[1mm³= 1/1000cm³]

Volume of wood

= 5.28 cm³

Answer 2

same as below
iys correct answe



thannx