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(21.98)²-(25.02)²+(13.03)²=?
[CBI (PO), 2010]
25
120
10
65
140
Explanation
Given,
It can be aprroximated as
(22)²-(25)²+(13)²=?
= 484-625+169
= 484+169-169
= 28 ≈ 25
Hence, Option A is correct.
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