Question

A cylindrical hole of diameter 20 cm bored through a cubical wooden block with side 1 m. Find the surface area of the object so formed. (π = 3.14

Answer 1

Answer:

Volume of Object = Volume of Cube  − Volume of Cylinder 

Radius of Cylinder r=15cm=0.15m

Height  of Cylinder = Side of Cube =   h=1m

side of Cube =a=1m

Volume of Cube =a3=13=1m3

Volume of Cylinder =πr2×h=13=3.14×(.15)2×1=.07065m3

Now 

Volume of Object =1m3−0.07065m3=0.92935m3

Answer 2

Step-by-step explanation:

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