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Mathematics: Post your doubts here!

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Q4)
It's a little tricky:


i) No. of biscuits = length of bread/diameter * breadth of bread/diameter
= 30/5 * 20/4
= 24 biscuits

ii) Remaining volume = total volume - 24(volume of one biscuit)
= 1080 - 24( pie*2.5^2*1.8) as the biscuit is a cylinder
= 232 cm^3


Thanks!
 
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Learn these 2 formulas:

1) This formula can only be applied if the difference is constant between the first and the second, second and third etc.
nth term = a + d (n - 1)
where:
'a' is the FIRST term
'd' is the DIFFERENCE between the terms


2) This formula can only be applied if, in simple terms, the first term is multiplied by a number to get the second term... and the second term is multiplied by the same number to get the third and so on:
nth term = ar^(n-1)
'a' is the FIRST term
'r' is the number they are being multiplied with
1, 2, 4, 8, 16 (for instance)
1*2^(n-1)
= 2^(n-1) Answer


There are many questions you can't solve even when you know these sequences. For that, you need to use some common sense and the sequences already given ;)


lol thanks ! yeah thats the problem.. i dun hav mch common sense :p
 
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