50 circular plates each of radius 7cm and thickness 1/2 cm are placed one above another to form a solid right circular cylinder.find total surface area and how much space will be left in a cubical box of side 25cm if solid formed is placed inside it
Answers
Answered by
1
height of cylinder = 50 *1/2
=25cm
total surface area=2Πr(h+r)
=2*(22/7)*7*(25+7)
=2*22*32
=1408
space left = volume of (cube-cylinder)
= (a^3 - Π(r^2)h)
= (25^3 - 22/7 (7*7) 25)
=25(625-22*7)
=25(625-154)
=25 (471) = 11775 cm^3.
=25cm
total surface area=2Πr(h+r)
=2*(22/7)*7*(25+7)
=2*22*32
=1408
space left = volume of (cube-cylinder)
= (a^3 - Π(r^2)h)
= (25^3 - 22/7 (7*7) 25)
=25(625-22*7)
=25(625-154)
=25 (471) = 11775 cm^3.
Answered by
0
Answer:
Check your answer please
Attachments:
Similar questions