1. Three bellsring simultaneously at 11 a.m. They ring at regular intervals of 20 minutes, 30 minutes, 40 minutes respectively. The time when all the three ring together next is

(a) 2 p.m.
(b) 1 p.m.
(c) 1.15 p.m.
(d) 1.30 p.m.

2. A and B together can do a works in 12 days. B and C together do it in 15 days. If A’s efficiency is twice that of C, then the days required for B alone to finish the work is

(a) 60
(b) 30
(c) 15
(d) 15

3. A and B can do a work in 12 days, B and C can do the same work in 15 days, C and A can do the same time work in 20 days. The time taken by A, B and C to do the same work is

(a) 5 days
(b) 10 days
(c) 15 days
(d) 20 days

4. A is 50% as efficient as B. C does half of the work done by A and B together. If C alone does the work in 20 days, then A, B and C together can do the work in

(a) 17/3 days
(b) 20/3 days
(c) 6 days
(d) 7 days

5. The ratio of the volumes of water and glycerine in 240cc of a mixture is 1 : 3. The quantity of water (in cc) that should be added to the mixture so that the newratio of the volume of water and glycerine becomes 2:3 is

(a) 55
(b) 60
(c) 62.5
(d) 64
 

Printed Study Kit for SSC CHSL (10+2) Exam

एसएससी CHSL(10+2) परीक्षा ​​अध्ययन सामग्री

Answer:
1. (b) 2. (c) 3. (b) 4. (b) 5. (b)