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Aptitude · Q96

Decimal Fraction

Competitive Exams · Aptitude · question 96

Q96

(78.95)2 - (43.35)2 = ?

A.
4148
B.
4235.78
C.
4305
D.
4353.88
Answer
E.
None of these

Answer: Option D

Solution

Answer: Option D
Solution:
(78.95)2 - (43.35)2
= (78.95 + 43.35) (78.95 - 43.35)
= 122.3 × 35.6
= 4353.88
[∵ a2 - b2 = (a + b) (a - b)]
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