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- Question
What is the value of cosec -150°?
Options- A. -2
- B. 2/?3
- C. 2
- D. -2/?3
- Correct Answer
- -2
- 1. A 270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train ?
Options- A. 230 m
- B. 240 m
- C. 260 m
- D. 320 m Discuss
- 2. The least value of tan2x + cot2x is
Options- A. 3
- B. 2
- C. 0
- D. 1 Discuss
- 3. A polygon 7 sides.How many diagonals can be formed?
Options- A. 14
- B. 7
- C. 15
- D. 21 Discuss
- 4. A train travelling with a speed of 60 km/hr catches another train travelling in the same direction and then leaves it 120m behind in 18 seconds. The speed of the second train is
Options- A. 42 kmph
- B. 72 kmph
- C. 36 kmph
- D. 44 kmph Discuss
- 5. Wood : Ghacoad :: Coal : ?
Options- A. Fire
- B. Smoke
- C. Coke
- D. Ash Discuss
- 6. A box contains 5 green, 4 yellow and 3 white marbles. Threemarbles are drawn at random. What is the probability thatthey are not of the same colour ?
Options- A. 40/44
- B. 44/41
- C. 41/44
- D. 40/39 Discuss
- 7. If x = 313- 3-13, then 3x3 + 9x value is
Options- A. 8
- B. 9
- C. 27
- D. 16 Discuss
- 8. The value of sin?+sin?cos?+cos? + cos?-cos?sin?-sin? is
Options- A. 1
- B. 2
- C. 1/2
- D. 0 Discuss
- 9. If 3a+4b3c+4d = 3a-4b3c-4d , then
Options- A. ab = cd
- B. ad = bc
- C. ac = bd
- D. a = b = c ? d Discuss
- 10. If Sec ? = 5/3, then what is the value of Cosec ??
Options- A. 0.8
- B. 1.25
- C. 4/3
- D. 3/4 Discuss
More questions
Correct Answer: 230 m
Explanation:
Relative speed = (120 + 80) km/hr
=(200*5/18)m/s = (500/9)m/s
Let the length of the other train be x metres.
Then, x+270/9 = 500/9
=> x + 270 = 500
=> x = 230.
Correct Answer: 2
Correct Answer: 14
Explanation:
- 7 = 14
Correct Answer: 36 kmph
Explanation:
Given speed of the first train = 60 km/hr = 60 x 5/18 = 50/3 m/s
Let the speed of the second train = x m/s
Then, the difference in the speed is given by
=> x = 10 m/s
=> 10 x 18/5 = 36 km/hr
Correct Answer: Coke
Explanation:
Second is obtained from the first.
Correct Answer: 41/44
Explanation:
n(E) = 5C3 + 4C3 + 3C3 = 10 + 4 + 1 = 15n(S) = 12C3 = 220
Correct Answer: 8
Correct Answer: 0
Correct Answer: ad = bc
Correct Answer: 1.25
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