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- Question
- Two trains of equals length are running on parallel line in the same direction at the rate of 46 kmph and 36 kmph. The faster train passes the slower train in 36 seconds. The length of each train is?
Options- A. 50 metres
- B. 72 metres
- C. 80 metres
- D. 82 metres
- Correct Answer
- 50 metres
ExplanationLet the length of each train = L metres
Relative speed = (46 - 36) = 10 km/hr. = 10 x (5/18) = 25/9 m/sec
Distance covered in crossing = (L + L) = 2L metres
? 2L x (9/25) = 36
? L = (25 x 36)/(2 x 9) = 50 metres. - 1. (798+579)2- (798-579)2798 x 579 =
Options- A. 2
- B. 6
- C. 4
- D. 8 Discuss
- 2. If x varies as y and x = 8 when y = 15 then the value of x when y = 10 is:
Options- A. 5
- B. 15/8
- C. 8/15
- D. 16/3 Discuss
- 3. The sum of two positive integers is 80 & difference between them is 20. Then what is difference of squares of those numbers ?
Options- A. 1400
- B. 1600
- C. 1800
- D. 2000 Discuss
- 4. In a school there are 1500 students, 44% of them are girls. Monthly fee of each boy is 540 and fee of each girl is 25% less than that of a boy. The sum of fees of boys & girl is
Options- A. Rs. 720600
- B. Rs. 720800
- C. Rs. 720900
- D. Rs. 721000 Discuss
- 5. Simplify the equation 0.733+0.2730.732+0.272-0.73×0.27
Options- A. 1
- B. 0.4087
- C. 0.73
- D. 0.27 Discuss
- 6. In a circle, two arcs of unequal length subtend angles in the ratio 5:3. If the smaller angle is 45° then the measure of other angle in degrees.
Options- A. 75°
- B. 72°
- C. 60°
- D. 78° Discuss
- 7. The orthocentre of an obtuseangled triangle lies
Options- A. inside the triangle
- B. outside the triangle
- C. on one side of a triangle
- D. none of these Discuss
- 8. The radius of base of a right circular cone is 6cm and its slant height is 10cm. Then its volume is (use ?=227)
Options- A. 301.71 cm3
- B. 310.71 cm3
- C. 301.17 cm3
- D. 310.17 cm3 Discuss
- 9. If a2+b2+c2=14 and a+b+c=6 , then the value of ab+bc+ca is,
Options- A. 11
- B. 12
- C. 13
- D. 14 Discuss
- 10. If ab+ba=1, then the value of a3+b3 is
Options- A. 1
- B. 0
- C. -1
- D. 2 Discuss
More questions
Correct Answer: 4
Explanation:
? 4(798 X 579) / (798 X 579)
? 4
Correct Answer: 16/3
Explanation:
x : y = 8 : 15
If y = 10, x = 8/15 X 10
y = 16/3
Correct Answer: 1600
Correct Answer: Rs. 720900
Correct Answer: 1
Correct Answer: 75°
Correct Answer: outside the triangle
Correct Answer: 301.71 cm3
Correct Answer: 11
Correct Answer: 0
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