Question

a cylinder vessel opened at the top has a base diameter and height 14 cm. find the cost of the tin plating if the cost 2.5 Dhs?​

Answer 1

Answer:

Curved surface area of cylinder = 2πrh

Curved surface area of cylinder = 2 × 22/7 × 21/2 × 14 cm²

Curved surface area of cylinder = 22 × 3 × 14 cm²

Curved surface area of cylinder = 924 cm²

Now, paint 100 cm² area cost = Rs 5

1 cm² cost = Rs 5 / 100 or Rs 1 / 20

Then area of 924 cm² will cost = Rs 1 / 20 × 924

= Rs. 46.2

Now area of circular base = πr²

= 22/7 × ( 21/2 )²

= 346.5 cm²

So cost if 346.5 cm² = Rs 1/20 × 346.5

= Rs 17.325

So total money consumed = Rs ( 46.2 + 17.325 )

= Rs 63.525

Answer 2

Step-by-step explanation:

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