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Acres to miles: conversion problem (book error?)

  • Thread starter Genecks
  • Start date
  • #1
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Homework Statement



Problem 2.2 An acre is defined such that 640 acres = 1 mi2. How many square meters
are in 1 acre?


Homework Equations



Solution From Table 2.1,
1 mi = 1.609 km = 1609 m
1 acre = 1/640 mi ^2

The Attempt at a Solution



My solution comes from wolfram alpha
4286 m^2

BOOK SOLUTION: 4.05 X 10^3 m^2

my on a calculator: 4045.13

So, why did wolfram get it wrong?
(1/604)(1609 m)^2 --> wolfram
 

Answers and Replies

  • #2
6,054
390
So, why did wolfram get it wrong?
(1/604)(1609 m)^2 --> wolfram
Can you see it?
 

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