Sunday, August 1, 2010

NMOS 2010 Q17












A1 = A2

B1 = B2

A2 + B2 = 2 C

Total = 5 C

So 2 shaded parts are 

2/5 x 100 = 40 cm²

2 comments:

  1. please explain from A2 + B2= 2c ----how?Cannot understand from here..pls.explain

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  2. Look at the small letters 2a and a.

    Base - 2 times, height - the same.

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