Question

find the surface area of a cuboid whose length is 3.2 m, breadth is 30 dm, height is 250 cm.

Answer 1

Answer : $\bold{50.2 m^2}$



Explanation - 

Given : 

Length ( l ) = 3.2 m 

Breadth (b) = 30 dm

(1/10 dm = 1 m) 

30/10 dm = 3m 

Height ( h ) = 250 cm 

(1/100 cm = 1 m)

250/100 = 2.5 m

So, 

Length = 3.2 m 

Breadth = 3 m 

Height = 2.5 m 



Finding the Surface area of the cuboid - 

Surface Area of the Cuboid = 2( lb + bh + hl )

$2(3.2 \times 3 + 3 \times 2.5 + 2 .5 \times 3.2) \: m^{2}$

$2(9.6 + 7.5 + 8) \: {m}^{2}$

$2 \times 25.1 \: {m}^{2}$

$50.2 \: \: {m}^{2}$



Hence :

$\bold{Surface \: of \: the \: cuboid \: = \: 50.2 m^2}$