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 cmsquare​

Answer 1

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The number of cubes that can be made is approx 9.

Step-by-step explanation:

Given : A cuboidal block of metal measuring 60cm×40cm×0.5m was melted and recast into cubical blocks each with an edge of length 5 cm.

To find : The number of cubes that can be made ?

Solution :

A cuboidal block of metal measuring 60cm×40cm×0.5m.

The volume of the cuboid is V_C=60\times 40\times 0.5V

C =60×40×0.5

A cubical blocks each with an edge of length 5 cm.

The volume of the cube is V_c=5\times 5\times 5V

c =5×5×5

\text{Number of cubes }=\frac{\text{Volume of cuboid}}{\text{Volume of cube}}Number of cubes = Volume of cube/Volume of cuboid

​

\text{Number of cubes }=\frac{60\times 40\times 0.5}{5\times 5\times 5}Number of cubes =

5×5×5

60×40×0.5

​

\text{Number of cubes }=9.6Number of cubes =9.6

Therefore, the number of cubes that can be made is approx 9

A cuboidal block of metal has dimensions 36cm by 32cm by 0.25m .It is melted and recast into cubes with an edge of 4cm find 1) how many such cubes can be made ? 2) what is the cost of silver coating the surfaces of the cubes at the rate of Rs 0.75 per square centimetre

Answer 2

Answer:

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