Out of these, which cannot be maximum capacity of a shell?
A
8
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B
18
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C
24
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D
32
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Solution
The correct option is C
24
The maximum capacity of a shell is given by 2n2. Now, lets see maximum capacity upto n = 5. n=1⇒2n2=2(1)2=2 n=2⇒2n2=2(2)2=8 n=3⇒2n2=2(3)2=18 n=4⇒2n2=2(4)2=32 n=5⇒2n2=2(5)2=50 'n' can only take natural number value So, 2n2=24 is not possible for any natural number.