CTET Solved Paper - UPTET December 2016 Paper2
- Option : A
- Explanation : (A) Let 'R' be the radius of the new circle. Area of new circular park = Area of circle 1 of diameter 16 m + Area of circle 2 of diameter 12 m
⇒ πR2 = π(8)2 + π(6)2 [∵ R1 = 16/2 = 8 R2 = 12/2 = 6]
⇒ πR2 = 64π + 36π
⇒ πR2 = 100π
⇒ R2 = 100 ⇒ R = 10 m
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130. Factors of x2 + 3√2x + 4 are
- Option : B
- Explanation : (B) x2 + 3√2x + 4
= x2 + 2√2x + √2x + 4
= x(x + 2√2) + √2 (x + 2√2)
= (x + 2√2)(x + √2)
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