We are given that the total surface area of a cuboid is and the ratio of its length to breadth to height is 4:2:1. We have to find the dimensions of the cuboid.
Let the length be 4a m, breadth be 2a m and height be 1a m.
Total surface area of the cuboid is.
We are already given that TSA of the cuboid is.
We have got the value of 7 m.
Therefore length is 4a m which is equal to , breadth is 2a m which is and height is 1a m which is .
Therefore, the dimensions of the cuboid are .
Hence, option 2 is the correct Ans:.