Question

By melting of a solid cuboid of length 16cm, breadth 11cm, height 10cm, how mam
solid coins of 0.2cm thick and 2cm diameter cam be formed?
a
(1) 2200
(2) 2400
3) 2600
(4) 2800


please explain the last step प्लीज एक्सप्लेन द लास्ट स्टेप ​

Answer 1

Answer:

First of all, we have to know the volume of the cuboid which is ( 16×11×10)

= 1760cm³.

Then we have to know the volume of the coins(cylinder).

Volume of the coins (V) = πr²h. [r = radius, h = height]

V = 22/7 × 1 × 2/10 [r = 1/2×diameter]

V = 44/70 or 0.628cm³(approx)

Number of coins = Volume of the cuboid ÷ Volume of the coins

= 1760 ÷ 0.628

= 2800

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