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

Q.1 $\frac{3}{4}$

Q.2 $\theta = 30$ degree

Q.3 OP = $r\sqrt{2}$

Q.4 K = 18

Q.5 5cm

Q.6 —–

Q.7 a = $-\frac{3}{2}$

Q.8 R (0, 1)

Q.9 19

Q.10 K = $\frac{1}{2}$

Q.11 a) $\frac{9}{49}$ b) $\frac{23}{49}$ c) $\frac{3}{49}$

Q.12 $25\sqrt{3}$

Q.13 —–

Q.14 $\frac{8 + 3\sqrt{2}}{2}$, $\frac{8 - 3\sqrt{2}}{2}$

Q.15 a = 14, d = $\pm$ 2

Q.16 $\frac{49}{2}cm^{2}$

Q.17 Area of Minor Segment = 28.5 $cm^{2}$, Area of Major Segment = 285.5 $cm^{2}$

Q.18 $16 \frac{1}{2}$ mins

Q.19 h = 2.5 meters

Q.20 286/7$cm^{2}$

Q.21 i) $\frac{15}{33}$ ii) $\frac{18}{33}$ iii) $\frac{3}{33}$ iv) $\frac{8}{33}$

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 = $\frac{40}{3}$ cm

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

Q.31 84$cm^{2}$

February 9, 2017

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