Mathematics
Grade-7
Easy

Question

Andrew draws a scale drawing of his restaurant. If each 5 cm on the scale drawing equals 10 feet, determine the perimeter in feet.

  1. 46    
  2. 25    
  3. 35    
  4. 49    

The correct answer is: 46


    each 5 cm on the scale drawing 10 feet ( according to question )
    then 1cm =10 over 5 space equals space 2 f e e t
    perimeter = sum of all the side
    perimeter = 4 + 6 + 6 + 7 = 23cm
    perimeter = 23 x 2 = 46 feet
    second method ;
    fraction numerator 10 over denominator 5 end fraction equals fraction numerator x over denominator 23 end fraction
    fraction numerator 10 over denominator 5 end fraction cross times 23 equals fraction numerator x over denominator 23 end fraction cross times 23
    fraction numerator 2 cross times 23 over denominator 1 end fraction equals x
    x = 46 feet.

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