Question

50 circular discs, each of radius 7cm and thickness 0.5cm are placed one above the other. Find the total surface area of the solid so formed. Find how much space will be left in a cubical box of side 25cm if the solid formed is placed inside it

Answer 1

2pie r(r+h)

2.22/7(7+25)

44(32)

1408

Answer 2

Answer:

Step-by-step explanation:

TSA of a cylinder-2*22\7*h*r

-height=50*0.5=25cm

radius-7 cm

-2*22\7*25*7

-1100 cm^2

volume of cylinder-22\7*r*r*h

-3388 cm^3

volume of cube-a^3

-15625 cm^3

space remaining=15625-3388

=12237 cm^3 will be remaining