Question

10.
(Hint: Use 1 m = 1000 L)
18. A metal cube of edge 12 cm is melted down and
formed into three smaller cubes. The edges of the two
smaller cubes are 6 cm and 8 cm. Find the edge of the
third cube.
19. Find the volume of the cuboid whose length is 16 cm,
breadth is 15 cm, and height is 8.5 cm.
20. Three equal cubes each of side 5 cm are joined end to
end. Find the surface area of the resulting cuboid,
21. Three cubes whose edges measure 3 cm, 4 cm, and 5
cm respectively are melted to form a single cube. Find
anon of the new cube.
11
1​

Answer 1

There are the solution of questions 18,19,and 20 are given below in the image.