(7.5 × 7.5+37.5+2.5 × 2.5) is equal to · ABC26GN0768

Subject: General Aptitude · Chapter: Decimal Fractions

$(7.5 \times 7.5+37.5+2.5 \times 2.5)$ is equal to

(a)30

(b)60

(c)80

(d)100

Answer

Answer (as printed): D

Explanation

Given expression = (7.5 × 7.5 + 2 × 7.5 × 2.5 + 2.5 × 2.5) = (a2 + 2ab + b2) = (a + b)2 = (7.5 + 2.5)2 = 102 = 100.

Explanation as extracted from the printed page; notation may be imperfect.

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