SOLUTION: 3 things cost rs. 100.. 2nd one is the half of first. 3rd one is the half of 2nd.. how much cost of the total three???

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Question 771823: 3 things cost rs. 100.. 2nd one is the half of first. 3rd one is the half of 2nd.. how much cost of the total three???
Answer by ramkikk66(644) About Me  (Show Source):
You can put this solution on YOUR website!
3 things cost rs. 100.. 2nd one is the half of first. 3rd one is the half of 2nd.. how much cost of the total three???
Ans:
Cost of the total 3 is already given to be 100!
I assume you are asking for the cost of each item.
Let the first item cost x
Then the 2nd costs x/2
And the 3rd costs (x/2)/2 (i.e. half of the second) = x/4
Sum = x+%2B+x%2F2+%2B+x%2F4+=+100
Multiplying by 4 to remove the fractional part
4%2Ax+%2B+2%2Ax+%2B+x+=+400
7%2Ax+=+400
x+=+400%2F7 approx Rs. 57.14 which is the cost of the 1st item
Second item = 200/7 = 28.57 approx
Third item = 100/7 = 14.28 approx
:)