Hello Aspirants. Welcome to Online Quantitative Aptitude section in AffairsCloud.com. Here we are creating question sample From all topics , which are Important for upcoming IBPS and RRB exams. We have included Some questions that are repeatedly asked in exams.

**Ages of A and B are in the ratio 1 : 2 and that of B and C are in the ratio of 3 : 4. Also 5 years ago the average of their ages was 12 years. Then find C’s age?**

A. 20

B. 24

C. 26

D. 30

**B. 24**

Explanation:

A/B = 1/2, B/C = 3/4

A : B : C = 3 : 6 : 8

Their total ages 3x+6x+8x = 17x

5 yrs ago, sum of their ages = 17x –(5+5+5) = 17x – 15

So (17x-15)/3 = 12

This gives x =3

So C’s age = 8x = 24 yrs**There are 3 red balls, 4 blue balls and 5 white balls. 2 balls are chosen randomly. Find probability that 1 is red and the other is white.**A. 5/22

B. 5/23

C. 7/22

D. 4/9

**A. 5/22**

Explanation:

3C1 * 5C1 / 12C2**There are 3 red balls, 4 blue balls and 5 white balls. 2 balls are chosen one after other. Find probability that first is red and the second is white.**

A. 5/44

B. 5/22

C. 7/44

D. 5/23

**A. 5/44**

Explanation:

(3C1/12C2) * (5C1/11C1)**There are 3 red balls, 4 blue balls and 5 white balls. 2 balls are chosen randomly. Find probability that atmost one ball is white.**

A. 28/43

B. 28/33

C. 7/33

D. 5/23

**B. 28/33**

Explanation:

Case 1: 0 white ball

7C2/12C2

Case 2: 1 white ball and other any of blue or red

7C1*5C1/12C2

Add the two cases.**A man goes from A to B at 14 km/hr and comes back from B to A at 15 km/hr. He covers both the journeys in 5 hrs 48 min. Find the distance from A to B?**

A. 38 km

B. 40 km

C. 42 km

D. 44 km

**C. 42 km**

Explanation:

Distance = (S1*S2)/[(S1+S2)t,

t = 5 hrs 48 min = 5 48/60 = 5 4/5 = 29/5 hrs

Distance A to B = (14*15)/[(14+15)*29/5] = 42 km**40 men cut 20 tress in 6 days working 6 hours a day. How many trees will be cut by 30 men in 12 days working 4 hours a day?**

A. 18

B. 20

C. 24

D. 30

**B. 20**

Explanation:

Let x trees

40*6*6*x = 30*12*4*20**A does a work in 15 days, and B does the same work in 16 days. A and B started the work, and after 6 days B left. A completed the remaining work. Find the total number of days after which the work will be completed?**

A. 7 days

B. 8 ¾ days

C. 9 days

D. 9 3/8 days

D. 9 3/8 days

Explanation:

Let A completed remaining work in ‘x’ days. So,

(1/15 + 1/16) * 6 + 1/15 * x = 1

x = 3 3/8

Total days = 6 + 3 3/8 = 9 3/8**A and B are 250 km apart. A train started from A at 9 AM at 60 km/hr. Another train started from B in opposite direction to A at 9:40 AM at 40 km/kr. At what time will they meet?**

A. 11:40 AM

B. 12:05 PM

C. 11:46 AM

D. 12:46 PM

**C. 11:46 AM**

Explanation:

9:40 – 9 = 40 minutes

After 40 minutes the train started from A with speed 60 km/hr will be 40/60 * 60 = 40 km apart from A.

Now distance left is 250-40 = 210

After 9:40 AM, the two train will meet after = 210/(60+40) = 21/10 hrs or 21/10 * 60 = 126 minutes = 2 hrs 6 min

9:40 + 2 hrs 6 min = 11:46 AM**A and B are 250 km apart. A train started from A at 9 AM at 60 km/hr. Another train started from B in opposite direction to A at 9:40 AM at 40 km/kr. At what distance from A they will meet?**

A. 126 km

B. 120 km

C. 130 km

D. 166 km

**D. 166 km**

Explanation:

From 8th ques, t = 21/10 hrs

Speed of first train is 60. After 40 km from A, the distance travelled by first train in 21/10 hrs = 21/10 * 60 = 126 km.

From A, they will meet at 40+126 = 166 km far

**The radii of the bases of cylinder and a cone are in the ratio of 3 : 4 and their heights are in the ratio 2 : 3. Find the ratio of their volumes.**

A. 8 : 9

B. 9 : 8

C. 7 : 8

D. 7 : 9

**B. 9 : 8**

Explanation:

Let radii of cylinder and cone be 3r and 4r, heights be 2h and 3h.

Vol of cylinder = πr^{2}h

Vol of cone = 1/3 πr^{2}h

Divide the two and put the values of radii and heights

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