Question

A 30 cm long, 20 cm wide and 10 cm high piece of iron is to be nickel plated. if the cost of nickel plating is 3000 per square metre, what will be the total cost?

Answer 1

$\textbf {Hey there, here is the solution.}$

.............................................................................................

STEP 1: convert units to m:

30 cm = 0.3 m

20 cm = 0.2m

10 cm = 0.1 m

.............................................................................................

STEP 2: Find surface area:

Surface area = 2(0.3 x 0.2) + 2(0.2 x 0.1) + 2(0.1 x 0.3)

Surface area = 2(0.06) + 2(0.02) + 2(0.03)

Surface area = 0.22m²

.............................................................................................

STEP 3: Find the cost:

1m² = Rs 3000

0.22m² = 3000 x 0.22 = Rs 660

.............................................................................................

Answer: The total cost is Rs 660

.............................................................................................

⭐$\textbf {Cheers}$⭐

Answer 2

❤Good Noon dear friend,

Your answer is 660 rupees.