Question

if sum of length breadth height of a cube is 22 cm and length of its diagonal is 6√7 cm find its total surface area​

Answer 1

Answer:

Let l,b,h, be the length, breadth and height of the cuboid.  

∴l+b+h=19 and  

l  

2

+b  

2

+h  

2

 

​  

=5  

5

​  

 

⇒l  

2

+b  

2

+h  

2

=(5  

5

​  

)  

2

=125

Surface area of the cuboid =2(lb+bh+lh)

=(l+b+h)  

2

 - (l  

2

+ b  

2

+ h  

2

)

= 19  

2

 - 125=361−125=236 cm  

2

Step-by-step explanation: