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Summative Assessment – II (SA-2) 2017 Answer Key | CBSE Board

Q.1 [latex]\frac{3}{4}[/latex]

Q.2 [latex]\theta = 30 [/latex] degree

Q.3 OP = [latex]r\sqrt{2}[/latex]

Q.4 K = 18

Q.5 5cm

Q.6 —–

Q.7 a = [latex]-\frac{3}{2}[/latex]

Q.8 R (0, 1)

Q.9 19

Q.10 K = [latex]\frac{1}{2}[/latex]

Q.11 a) [latex]\frac{9}{49}[/latex] b) [latex]\frac{23}{49}[/latex] c) [latex]\frac{3}{49}[/latex]

Q.12 [latex]25\sqrt{3}[/latex]

Q.13 —–

Q.14 [latex]\frac{8 + 3\sqrt{2}}{2}[/latex], [latex]\frac{8 – 3\sqrt{2}}{2}[/latex]

Q.15 a = 14, d = [latex]\pm[/latex] 2

Q.16 [latex]\frac{49}{2}cm^{2}[/latex]

Q.17 Area of Minor Segment = 28.5 [latex]cm^{2}[/latex], Area of Major Segment = 285.5 [latex]cm^{2}[/latex]

Q.18 [latex]16 \frac{1}{2}[/latex] mins

Q.19 h = 2.5 meters

Q.20 286/7[latex]cm^{2}[/latex]

Q.21 i) [latex]\frac{15}{33}[/latex] ii) [latex]\frac{18}{33}[/latex] iii) [latex]\frac{3}{33}[/latex] iv) [latex]\frac{8}{33}[/latex]

Q.22 120 meter

Q.23 —–

Q.24 Rhombus

Q.25 i) 550 ii) 775 iii) 4375

Q.26 36 km/hr

Q.27 Length = 7; Breadth = 4

Q.28 —–

Q.29 AP = [latex]\frac{40}{3}[/latex] cm

Q.30 The section is made 20 cm above the base

Q.31 84[latex]cm^{2}[/latex]

 


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