Question

A tube of a metal 7cm edge is melted and caste
into a cuboid whose base is 3.50 cm * 0.50 cm
Find the height of cuboid
Also find the surface area of cube and cuboid​

Answer 1

Answer:

Edge of the cube, a = 7cm

Lenght , L of the cuboid = 3.50 cm

Breath , B of the cuboid = 0.50 cm

Height , H of the cuboid = ?

Step-by-step explanation:

Volume of a cuboid = l × b × h

• =3.50×0.50×h

h = 3.50 × 0.50

= 1.75

A/Q,

Surface area of the cube = 6a²

= 6×7²

= 294 cm²

Surface area of the cuboid

= 2(lb + bh + hl)

= 2(3.50×0.50 + 0.50×1.75 + 1.75×3.50)

= 17.5 cm²