Maths-
General
Easy

Question

If ABCD is a Rectangle, then the area of Rectangles (1) + (5) + (3) is

  1. 12 a to the power of 2 end exponent plus 10 a b plus 20 a c    
  2. 12 a to the power of 2 end exponent plus 12 a b plus 12 a c    
  3. 10 a to the power of 2 end exponent plus 10 a b plus 10 a c    
  4. 20 a to the power of 2 end exponent plus 20 a b plus 15 a c    

The correct answer is: 12 a to the power of 2 end exponent plus 10 a b plus 20 a c


    space A r e a space o f space 1 space equals 4 a cross times 3 a space space space space space space space space space space
space space space space space space space space space space space space space space space space space space space equals 12 a squared
A r e a space o f space 3 space equals 5 c cross times 4 a
space space space space space space space space space space space space space space space space space space equals 20 a c
A r e a space o f space 5 space equals 2 b cross times 5 a
space space space space space space space space space space space space space space space space space space equals 10 a b
A r e a space o f space 1 plus 5 plus 3 equals 12 a squared plus 20 a c plus 10 a b

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