Maths-
General
Easy

Question

If 50 one-cent coins were stacked on top of each other in a column, the column would be approximately 3 7 over 8 inches tall. At this rate, which of the following is closest to the number of one-cent coins it would take to make an 8-inch-tall column?

  1. 75
  2. 100
  3. 200
  4. 39

The correct answer is: 100


    HINT – Find the no of coins used to make 1 inch tall column .
    SOLUTION – It is given that
    No of coins used to make  3 7 over 8 ( = 31 over 8 ) inches tall column = 50
    No of coins used to make 1 inch tall column
    fraction numerator left parenthesis N o space o f space c o i n s space u s e d space t o space m a k e space begin display style 31 over 8 end style space space i n c h e s space c o l u m n right parenthesis over denominator left parenthesis L e n g t h space o f space t h e space c o l u m n right parenthesis end fraction
    fraction numerator 50 space cross times space 8 over denominator 31 end fraction
    400 over 31 inches
    No of coins used to make 8 inch tall column = 400 over 31 cross times 8
    3200 over 31
    = 103.22
    So, according to questions the closet answer is 100
    Hence, option B is correct

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