Question

The length breadth and height of a rectangular
solid are in the creatio 5:4:2. if the total
suface area is 1210 cm, find the length,
the breadth and the height of the solid​

Answer 1

Answer:  The rectangular solid is a cuboid.

Let the length of the cuboid =5a, breadth =4a, and height =2a

Total surface area of a cuboid of length l, breadth b and height h =2(l×b+b×h+l×h)

Given, total surface area of the cuboid =1216cm  

2

 

⇒2(5a×4a+4a×2a+2a×5a)=1216cm  

2

 

⇒76a  

2

=1216

⇒a=4

Hence, the length of the cuboid =5a=20 cm, breadth =4a=16 cm, height =2a=8 cm  

hope it helps

tq..........///////

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