Question

help..?.........................

Answer 1

the wooden cylinder that can be cut from the cuboid of lenght 30cm, and cross section square of side 14cm, will have a lenght of 30 cm and diameter of base as 14cm.

Radius of cylinder = 7 cm

the volume of the wooden cylinder formed = ⊼ r2 h

=  ⊼ (7)^2 * 30= 4620 cm3

volume cuboid = (30 * 14 * 14)= 5880

volume of wood wasted = volume cuboid - volume of cylinder

= 5880 - 4620 = 1260 cm3    ANS

plz mark me brainly if u feel its helpful to u

Answer 2

Given : Length of the cuboid = 30 cm

And having cross sections like squares of side 14 cm

So, height and breadth of cuboid is 14 cm.

For maximum possible volume of cylinder,  

Radius of cylinder = 7 cm

Length of the cuboid = height of the cylinder = 30 cm

So,  

Volume of cylinder = πr²h

= 22/7*7*7*30

Volume of the cylinder = 4620 cm³

Now,

Volume of the cuboid = L*B*H

= 30*14*14

Volume of the cuboid = 5880 cm³

Volume of the wood left as wasted = Volume of the cuboid - Volume of the cylinder

= 5880 - 4620

Volume of the wood wasted = 1260 cm³