141. A circle has area 154 square units. Its diameters have equations 2x - 3y + 12 = 0 and x + 4y - 5 = 0. Then the radius of the circle is
8 units
7 units
6 units
5 units
142. If tan 60° = 3, then the value of sec 60° is
4
3
2
1
143. The angle between two lines 3x + y - 7 = 0 and x + 2y + 9 = 0 will be
60°
45°
30°
90°
144. A triangle has vertices (1, 6), (3, 0) and (-3, -7). Its area in square units is
10
25
30
40
145. The series 1/ 2 + 5/ 6 + 7/ 6 + ....... is
arithmetic series
geometric series
harmonic series
exponential series
146. If 2nC3: nC2 = 12: 1, then the value of n is
6
5
4
3
148. Given, log 2 = 0.30103. Then log 5 isTo be choose right answer
0.2301
0.5302
0.720
0.6987
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