Question

An oil tin in the shape of a cuboid has dimensions 26 cm x 26 cm x 45cm. The total cost for making 20 such tins at
₹10/$m^2$ is .

• A. ₹ 120.64
• B. ₹ 125.60
• C. ₹ 128.60

Answer 1

The correct option is A ₹ 120.64

Given the dimensions of the cuboidal oil tin:
Length(l) = 26 cm,
Breadth(b) = 26 cm and
Height(h) = 45 cm

Total surface area of one oil tin is
$2(lb+bh+hl)$

Total area of the tin sheet required = Area of 20 oil tins

$\therefore$ Area of 20 oil tins $=20\times 2(lb+bh+hl)=20\times 2(26\times 26+26\times 45+45\times 26)=120640{\text{cm}}^2=12.064m^2$

Cost of 1 $m^2$ tin sheet = ₹10

Hence, the cost of 12.064 $m^2$ tin sheet = ₹10 $\times$ 12.06 = ₹120.64

So, total cost for making 20 such tins = ₹120.64