Question

a cuboidal oil tin is 50 cm by 30 cm by 40 cm find the cost of the tin required for making 20 such terms if the cost of tin sheet is rupees 20 per square metre ​

Answer 1

$\red{\textbf{Answer :- Rs.37.60}}$

Step-by-step explanation:

$\red{\textbf{Given :-}}$

$\textsf{length = 30}$

$\textsf{breadth = 40}$

$\textsf{height = 50}$

$\textsf{Now,}$

$TSA \: of \: cuboid = 2(lb + bh + hl)$

$= 2(30 \times 40 + 40 \times 50 + 50 \times 30)$

$= (1200 + 1500 + 2000)$

$= 9400 {cm}^{2}$

$= \Large \frac{9400}{100 \times 100} \: \: {m}^{2}$

$TSA \: of \: one \: tin \: box = 0.94 {m}^{2}$

$TSA \: of \: 20 \: tin \: boxes \: = 0.94 \times 20$

$cost \: of \: tin = TSA \: \times \: Rate$

$= (0.94 \times 20) \times 20$

$= 1.88 \times 20$

$= Rs.37.60$

$\textsf{so ,cost of the tin required for making 20 }$

$\textsf{such terms is Rs.37.60}$