131). A, B and C can do a piece of work in 24, 30 and 40 days respectively. They began the work together but C left 4 days before completion of the work. How many days was the work done?
| A). 13 |
| B). 14 |
| C). 11 |
| D). 12 |
|
132). The value of \( tan1 ^{\circ} tan2 ^{\circ} tan3 ^{\circ} ........tan89 ^{\circ} \) is
| A). 1 |
| B). 0 |
| C). -1 |
| D). None |
|
133). lf two medians BE and CF of a triangle ABC, intersect each other at G and if BG = CG,
\( \angle BGC = 60 ^{\circ} \), BC = 8 cm, then area of the triangle ABC is:
| A). \( 48 cm^{2} \) |
| B). \( 64\sqrt{3} cm^{2} \) |
| C). \( 96\sqrt{3} cm^{2} \) |
| D). \( 48\sqrt{3 cm^{2}} \) |
|
134). If two supplementary angles differ by \( 44 ^{\circ} \), then one of the angle is :
| A). \( 68 ^{\circ} \) |
| B). \( 72 ^{\circ} \) |
| C). \( 102 ^{\circ} \) |
| D). \( 65 ^{\circ} \) |
|
135). Out of four numbers the average of the first three is 16 and that of the last three is 15. lf the last number is 20 then the first number is :
| A). 23 |
| B). 28 |
| C). 25 |
| D). 21 |
|
136). The printed price of an article is 40% higher than its cost price. Then the rate of discount so that he gains 12% profit is:
| A). 0.21 |
| B). 0.18 |
| C). 0.2 |
| D). 0.15 |
|
137). If \( \Large x +\frac{1}{x}=2 \), then the value of \( \Large x^{12}-\frac{1}{x^{12}} \) is :
|
138). lf the sum of two numbers, one of which is \(\Large \frac{2}{5} \) times the other is 50, then the numbers are:
| A). \( \Large \frac{115}{7}, \frac{235}{7} \) |
| B). \( \Large \frac{150}{7}, \frac{200}{7} \) |
| C). \( \Large \frac{240}{7}, \frac{110}{7} \) |
| D). \( \Large \frac{250}{7}, \frac{100}{7} \) |
|
139). List price of a book is Rs.100. A dealer sells three such books for Rs.274.50 after allowing discount at a certain rate. Find the rate of discount.
| A). 0.085 |
| B). 0.0831 |
| C). 0.0833 |
| D). 0.0816 |
|
140). If PQRS is a rhombus and \( \angle SPQ = 50 ^{\circ} \), then \( \angle RSQ \) ls:
| A). \( 55 ^{\circ} \) |
| B). \( 65 ^{\circ} \) |
| C). \( 75 ^{\circ} \) |
| D). \( 45 ^{\circ} \) |
|
