Question

a cubical solid of metal has length ,breadth and height as 40 cm ,30 cm and 25 cm ,find the (i) volume of the solid cuboid. (ii) if this solid is melted and recasted into solid cubes each of side 5 cm ,find the number of cubes formed. (iii) find the total surface area of all the cubes formed

Answer 1

1) 3000 CM because volume of cuboid lbh

Answer 2

volume of solid cuboid=length x breathe x height =40x30x25=30000cm^3
(2) no of cube =30000/125=240
(3) total surface of all cube=240x6x25
" " =36000cm^2