1.

What is the value of (7.5 × 7.5 + 37.5 + 2.5 × 2.5) ?(a) 30(b) 60 (c) 80 (d) 100

Answer»

(d) 100

Given exp. = (7.5)2 + 2 × 7.5 × 2.5 + (2.5)2 

= (7.5 + 2.5)2 = 102 = 100.



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