Question

A cuboid is 8 m long, 12 m broad and 3.5 high, Find its (i) total surface area

Answer 1

Answer:

TSA=2h(l+b)

=2×3.5(8+12)

=7(20)

=140square cm

Answer 2

Answer:

Step-by-step explanation:

Given :-

• Length of a cuboid = 8 m
• Breadth of a cuboid = 12 m
• Height of a cuboid = 3.5 m

To Find :-

• Total surface area

Formula to be used :-

• Total surface area = 2(lb + bh + hl)

Solution :-

$\sf \implies Total \: surface \: area = 2(lb + bh + hl)\\\sf \implies Total \: surface \: area = 2(8 \times 12 + 12 \times 3.5 + 3.5 \times 8)\\\sf \implies Total \: surface \: area = 2(96 + 42 + 28)\\\sf \implies Total \: surface \: area = 2 \times 166\\\bf \implies Total \: surface \: area = \underline {332 \: m^2}$

Hence, the total surface area is 332 m²