Question

The ratio of length, breadth and height of a rectangular solid is 3 : 2 : 1 and its total surface area is 352 sq. cm, then find the length?​

Answer 1

Answer:

Step-by-step explanation:Given that,

The ratio of length, breadth and height of a rectangular solid is 3 : 2 : 1

Let assume that

Length of a rectangular solid be 3x cm

Breadth of a rectangular solid be 2x cm

Height of a rectangular solid be x cm

So, According to statement,

Total surface area of rectangular solid = 352 sq. cm

We know,

Total surface area of the Cuboid of length l, breadth b and height h is given by

So, on substituting the values, we get

Hence,

Length of a rectangular solid = 3x = 3 × 4 = 12 cm

Breadth of a rectangular solid = 2x = 2 × 4 = 8 cm

Height of a rectangular solid = x = 4 cm

Thus,

Length of a rectangular solid be 12 cm.

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

Additional Information

Formula's of Cube :-

Total Surface Area = 6(side)²

Curved Surface Area = 4(side)²

Volume of Cube = (side)³

Diagonal of a cube = √3(side)

Perimeter of cube = 12 x side

Formula's of Cuboid

Total Surface area = 2 (Length x Breadth + breadth x height + Length x height)

Curved Surface area = 2 height × (length + breadth)

Volume of the cuboid = length × breadth × height

Diagonal of the cuboid =√(l² + b² + h²)

Perimeter of cuboid = 4 (length + breadth + height)

Answer 2

according to newton law of gravitation force exerted btw 2 particles is F=Gm1m2/r2. from the above formula write down the gravitation constant and also write its unit