12. Find the duplicate ratio of 4 : 5.
13. The total number of male and femal employees in
a company are 60. Which of the following represent
the ratio of male and female employees in the
company.?
(a) 1 : 4 (b) 4 : 3 (c) 1 : 6 (d) 5 : 3
14. The LCM of two numbers is 160, and their
ratio is 4 : 5. Find the largest of the two numbers.
(a)40 (b) 45 (c) 20 (d) 15
15. If a/2 = b/3 = c/4. Find the ratio a : b :
c.
16. x/4 = y/3. Find the ratio (x + 4) : ( y + 3).
17. In a class 20% of the boys is equal to 1/4
th
of
the girls. What is the ratio of the boys and girls in
the class.
18. Find the compound ratio of 2 : 3 and 5 : 4.
19. The sum of five times the first number and two
times the second number is equal to twice the
difference of thrice of the first number and twice the
second. Find the ratio of the two numbers.
(a) 1 : 6 (b) 6 : 1 (c) 2 : 1 (d) 3 : 4
20. If 60 men do a piece of work in 27 days, then in
how many days can 18 men do the same work?
(a) 120 days (b) 90 days (c) 100 days (d) 60 days