Question

the areas of the following polygons :
8 cm
B
8 cm
8 cm
8 cm
8 cm
8 cm
11
8 cm
cm
13 cm->
CO
12 cm
12 cm
4 cm
25 m
6 cm
6 m
2 cm
3 cm
19.5 m
5 cm​

Answer 1

Answer:

Step-by-step explanation:

The dimensions of the three cuboids are 5 cm×6 cm×7 cm,4 cm×7 cm×8 cm and 2 cm×3 cm×13 cm.

Now, a new cube is formed by melting the given cuboids

∴ Voulume of the cube = sum of the volumes of the cuboids  

=(5 cm×6 cm×7 cm)+(4 cm×7 cm×8 cm)+(2 cm×3 cm×13 cm)

=(210 cm  

3

)+(224 cm  

3

)+(78 cm  

3

)

=512 cm  

3

 

Since volume of a cube =(side)  

3

, we have  

512=(side)  

3

 

⇒side=  

3

 

512

​  

=8 cm

∴ The side of the new cube is 8 cm.