Question

12. A cuboidal block of metal measuring 60 cm x 40 cm * 0.5m was melted and recast into cubical
blocks each with an edge of length 5 cm.
(a) Find the number of cubes that can be made.
(b) What is the cost of polishing the surfaces of the cubes at the rate of 1.25 per cm??​

Answer 1

Step-by-step explanation:

12.a Volume of cuboidal block= length x breath x height

Volume of cuboid= 60 x 40 x 0.5= 1200 cm^3

Volume of cube= (side)^3= (5)^3= 125 cm^3

Therefore the number of blocks are: 1200/125=9.6

Answer for a: 10 cubes.

12.b Cost= Volume x rate

Cost= 125 x 1.25

Cost= 156.25

I hope this helps.