Maths-
General
Easy

Question

The length of a rectangle is 16 cm and each of its diagonal measures 20 cm. The breadth is:

  1. 9 cm  
  2. 10 cm  
  3. 12 cm  
  4. 14 cm  

The correct answer is: 12 cm


    b equals square root of left parenthesis 20 right parenthesis to the power of 2 end exponent minus left parenthesis 16 right parenthesis to the power of 2 end exponent end root
    equals square root of 400 minus 256 end root equals square root of 144 equals 12 c m

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