Discussion
Home ‣ Aptitude ‣ Volume and Surface Area See What Others Are Saying!
- Question
- A rod of 2 cm diameter and 30 cm length is converted into a wire of 3 cm length of uniform thickness. The diameter of the wire is?
Options- A. 2/10 cm
- B. 2/?10 cm
- C. 1/?10 cm
- D. 1/10 cm
- Correct Answer
- 2/?10 cm
ExplanationGiven, r1 = 1 cm, h1 = 30 cm, h2 = 300 cm.
Volume of rod = Volume of wire
? ?r12h1 = ?r22h2
? ? x (1)2 x 30 = ? x r22 x 300
? r22 = 30/300
? r2 = 1/?10 cm
? diameter = 2r2
= 2 x 1/?10 = 2/?10cm. - 1. A can give B 15 points, A can give C 22 points and B can give C 10 points. How many points make the game?
Options- A. 50
- B. 60
- C. 70
- D. 80 Discuss
- 2. If 1.5 x a = 0.04 x b then the value of (b - a) / ( b + a) is?
Options- A. 730 / 77
- B. 73 / 77
- C. 7.3 / 77
- D. None of thesse Discuss
- 3. On a scale of a map 0.6 cm represents 6.6 km. If the distance between two points on the map is 80.5 cm, what is the actual distance between these points?
Options- A. 885.5 km
- B. 870 km
- C. 872.5 km
- D. 895 km Discuss
- 4. Two angles are supplementary and the ratio of the angels is 1:4. what is the value of smaller angle?
Options- A. 36 degree
- B. 45 degree
- C. 35 degree
- D. 72 degree Discuss
- 5.
If x = 4ab , then the value of x + 2a + x + 2b is a + b x - 2a x - 2b
Options- A. a
- B. b
- C. 0
- D. 2 Discuss
- 6. 3, 10, 21, 36, 55, 70, 105?
Options- A. 105
- B. 70
- C. 36
- D. 55 Discuss
- 7. The average salary of A, B and C is Rs.10,000 and average expenditure of A is Rs. 6000 then the average savings of B and C is
Options- A. Rs. 5500
- B. Rs. 4500
- C. Rs. 4000
- D. can't be determined Discuss
- 8. Kareena can do a piece of work in 9 days and Krishna can do the same work in 18 days. They started the work. After 3 days Shahid joined them, who can complete alone the same whole work in 3 days. What is the total No. of days in which they had completed the work?
Options- A. 12
- B. 8
- C. 4
- D. 6 Discuss
- 9. A and B can do a piece of work in 10 h. B and C do it in 15 h, while A and C take 12 h to complete the work. B independently can complete the work in
Options- A. 12 h
- B. 16 h
- C. 20 h
- D. 24 h Discuss
- 10. A moneylender finds that due to a fall in the rate of interest from 13% to 12 1/ 2% his yearly income diminishes by Rs. 104. His capital is?
Options- A. Rs. 21400
- B. Rs. 20800
- C. Rs. 22300
- D. Rs. 24000 Discuss
More questions
Correct Answer: 50
Explanation:
Let assume the game has P points.
Then A has P points , B has (P ? 15) and C has (P ? 22) points and also if B has P points then C has (P ? 10) points.
Applying chain rule,
P x P ( P ? 22 ) = P ( P ? 15) ( P ? 10)
? P2 ? 22P = P2 ? 25P + 150
? 3P = 150
? P = 50
Correct Answer: 73 / 77
Explanation:
a / b = 0.04 / 1.5
= 4 / 150
= 2 / 75
? Given Exp. (b - a) / ( b + a)
= (1- a/b ) / (1 + a/b)
= (1- 2 / 75) / (1 + 2 / 75)
= ( 73/75 ) / ( 77/75)
= 73/77
Correct Answer: 885.5 km
Explanation:
0.6 cm represents 6.6 km in a scale.
1 cm represents 6.6 / 0.6 km in a scale.
80.5 cm represents 6.6 x 80.5 / 0.6 km in a scale.
80.5 cm represents 11 x 80.5 km in a scale.
80.5 cm represents 885.5 km in a scale.
Correct Answer: 36 degree
Explanation:
As we know that the angles are supplementary so sum of angles will be 180 degree.
Let us assume that the ratio factor is r.
According to question,
Angles are supplementary and have a ratio of 1:4.
r + 4r = 180
? 5r = 180
? r = 180/5
? r = 36
Correct Answer: 2
Explanation:
Correct Answer: 70
Explanation:
The pattern is 1 x 3, 2 x 5, 3 x 7, 4 x 9, 5 x 11, 6 x 13, 7 x 15 etc.
So 70 is not correct.
Correct Answer: can't be determined
Explanation:
Total income = Total expenditure + Total savings
We are not find the average savings of B and C, Since data is insufficient.
Correct Answer: 4
Explanation:
Efficiency of Kareena and Krishna = 11.11 + 5.55 = 16.66%
Work done in 3 days = 3 x 16.66 = 50%
Rest work done by Kareena, Krishna and Shahid = 50/50 = 1 day
(Since efficiency of Shahid = 33%)
Thus in ( 3 + 1) days they have completed the work = 4 days.
Correct Answer: 24 h
Explanation:
A's and B,s 1 h work= 1/10
B's and C,s 1 h work = 1/15
and A's and C's 1 h work = 1/12
? A's B's and C's 1 h work
= (1/2) x [(1/10) + (1/15) + (1/12)] = (1/2) x (1/4) = 1/8
Hence B's work in 1 h = (1/8) - (1/12) = 1/24
? B independently can complete the work in 24 h.
Correct Answer: Rs. 20800
Explanation:
Let capital = Rs . P
Then, SI1 - SI2 = 104.
? (P x 13 x 1)/100 - (P x 25/2 x 1) /100 = 104
? 13P/100 - P/8 = 104
? 26P -25P = (104 x 200)
? P = 20800
? Capital = Rs. 20800
Comments
There are no comments.More in Aptitude:
Programming
Copyright ©CuriousTab. All rights reserved.