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6 January, 05:26

A stack of boards is in the storage shed. Each board is 2-1/5 inches high and there are 21 boards. How many inches high is the stack?

a

231/2

b

46-1/5

c

42-1/5

d

231/5

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Answers (1)
  1. 6 January, 05:52
    0
    46 1/5 inches tall

    Step-by-step explanation:

    We know each board is 2 1/5 inches high

    Change this to an improper fraction

    2 1/5 = (5*2+1) / 5 = 11/5

    Multiply this by the number of boards

    11/5 * 21 = 231/5

    Change this back to a mixed number

    5 goes into 231 46 times

    46*5 = 230 there is 1 left over

    46 1/5 inches tall
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