Question

please help me solving this

Answer 1

Heya mate,.

Here is your answer,.⬇️⬇️

${ANSWER :-}$
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$<i>$ Here, we have,
Diameter of the cylinder = 10cm = 100mm.
Height of the cylinder = 12cm = 120mm.

So, radius = 100/2 = 50mm.
_ _ _ _ _ _ _

Now, its curved surface area
= 2 * pi * radius * height
= 2 * 314/100 * 50 * 120 sq.mm
= 314 * 120 sq.mm
= 37680 sq.mm
_ _ _ _ _ _ _

Thus, the length of wire required
= 37680/3 = 12560 mm.
_ _ _ _ _ _ _

Volume of the wire
= pi * r * r * h
= 314/100 * 3/2 *3/2 * 12560 cu.mm
= 314/10 * 1256 * 9/4 cu.mm
= 394384/10 * 9/4 cu.mm
= 88736.4 cu.mm
_ _ _ _ _ _ _

Now, we have,
1 cu.cm = 1000 cu.mm

So, 88736.4 cu.mm = 88.7364 cu.cm
_ _ _ _ _ _ _

So,mass of the wire
= density * volume
= 88.7364 * 8.8 g
= 781 g (approximately)
_ _ _ _ _ _ _

➡️ Hence, the length of wire required is 12560 mm = 1256 cm, and the mass of the wire is 781 g (approx)

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$<b>$Hope this helps,.

If helps, please mark it as brainliest ^_^

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REGARDS, ARNAB ✌️

THANK YOU