Ans 1:
Class : Class 9
For fig (i)
Volume of the cuboid= l×b×h
= 30×40×25= 30000 cm^3
For fig (ii)
Volume of the cube= (Side)^3
= 35×35×35= 42875 cm^3
Therefore, Fig (ii) requires more amount of material to be made.
ANSWER: Option B.