New Learning Composite Mathematics Class 6 SK Gupta Anubhuti Gangal Ratio Proportion and Unitary Method Chapter 8A Solution
(1) (a) (i) Number of roses/Number of lilies
= 10/12
= 5/6
∴ The ratio of roses to lilies = 5:6
(ii) Number of daisies/Number of roses
= 8/10
= 4/5
∴ The ratio of daisies to roses = 4:5
(iii) Number of lilies/Number of daisies
= 12/8
= 3/2
∴ The ratio of lilies to daisies = 3:2
(iv) Number of roses/Number of all flowers
= 10/10+8+12
= 10/30
= 1/3
∴ Ratio of roses to all flowers = 1:3
(b) (i) Number of class 6 students/Number of class7 students
= 30/25
= 6/5
∴ Ratio of class 6 students to class 7 students = 6:5
(ii) Number of class 6 students/Number of total students
= 30/30+25+40
= 30/95
= 6/19
∴ Ratio of class 6 students to total no. of students = 6:19
(iii) Number of class 7 students/Number of class 8 students
= 25/40
= 5/8
∴ Ratio of class 7 students to class 8 students = 5:8
(iv) Number of class 7 and class 8 students/Number of class 6 students
= 25+40/30
= 65/30
= 13/6
∴ Ratio of class 7 and class 8 students to class 6 students = 13:6
(c) One part of oxygen/Two part of hydrogen
= 1/2
∴ Ratio of oxygen and hydrogen = 1:2
(d) No. of students passing in first division/Total no of students
= (2/3)/1
= 2/3
∴ Ratio of students passing in first division to total no. of student = 2:3
(2) (a) MY dad : I = 2:1
(b) My lawn : Mr Shukla’s lawn = 3:1
(c) Candidate who cleared the test total candidate
= 2/5 :1
= 2:5
(5) (a) No. of boys/No. of girls
= 500/350
= 10/7
Ans – 10:7
(b) No. of girls/Total no. of students
= 350/500+350
= 350/850 = 7/17
Ans – 7:17
(c) No. of teachers/Total no. of students
= 50/500+350
= 50/850
= 1/17
Ans – 1:17
(6) Speed of the scooteriest/Speed of the car driver
= (48/1)/(120/2)
= 48/60
= 4/5
Ans – 4:5
