Question

6. Surface area of brick (10cm x 4cm x 3cm) is​

Answer 1

Answer:

Correct answer is   164 sq.cm

Step-by-step explanation:

The formula for calculating the surface area of a cuboid of dimensions :

l×b×h is :

2×(l×b+b×h+h×l)

Substituting,

l=10cm

b=4cm

h=3cm

Surface area = 2×(10×4+4×3+3×10)

=2×(40+12+30)

=2×82sq.cm  

=164sq.cm

 

Answer 2

Answer:

Total surface area is 164 $cm^{2}$

Lateral surface area is 84 $cm^{2}$

Step-by-step explanation:

Given :- Dimensions are 10cm x 4cm x 3cm

To find :- a)Total surface area

               b)Lateral surface area

Solution :-a) TSA = 2(lb + bh + bl)

                            = 2(10 x 4 + 4 x 3 + 10 x 3 )

                            = 2(40 + 12 + 30 )

                            = 2(82)

                            =164 $cm^{2}$

                b) LSA =2(l+b)h

                            =2(10 + 4 )3

                            =2 x 14 x 3

                            =84 $cm^{2}$

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