Q14) Ex-12.1 Class 6 Maths Chapter 12 Ratio And Proportion | Class 6 Maths CBSE NCERT By Deepak
Q14) Ex-12.1 Class 6 Maths Chapter 12 Ratio And Proportion | Class 6 Maths CBSE NCERT By Deepak
Hello students, in this chapter you are going to learn a very good concepts related to the Ratio & Proportions.
I will first tell you what is exactly a Ratio & Proportions means which is very important to know for understanding the whole chapter.
We will go topic wise
1) WHAT IS RATIOS ?
2) EQUIVALENT RATIOS
3) WHAT IS PROPORTIONS?
4) UNITARY METHODS
chapter 12TH CLASS 6TH MATHEMATICS ratio and proportion-
12.1 Introduction
12.2 Ratio
12.3 Proportion
12.4 Unitary Method
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class 6 exercise 12.1 question number 1,
class 6 maths exercise 12.1 question number 1,
class 6 chapter 12 ratio and proportion exercise 12.1,
maths exercise 12.1 chapter 12 ratio and proportion,
EXERCISE 12.1
1. There are 20 girls and 15 boys in a class.
(a) What is the ratio of number of girls to the number of boys?
(b) What is the ratio of number of girls to the total number of students in the class?
2. Out of 30 students in a class, 6 like football, 12 like cricket and remaining like tennis. Find the ratio of
(a) Number of students liking football to number of students liking tennis.
(b) Number of students liking cricket to total number of students.
3. See the figure and find the ratio of (a) Number of triangles to the number of circles
inside the rectangle.
(b) Number of squares to all the figures inside the rectangle.
(c) Number of circles to all the figures inside the rectangle.
4. Distances travelled by Hamid and Akhtar in an hour are 9 km and 12 km. Find the
ratio of speed of Hamid to the speed of Akhtar.
5. Fill in the following blanks: [Are these equivalent ratios?]
6. Find the ratio of the following : (a) 81 to 108 (b) 98 to 63
(c) 33 km to 121 km (d) 30 minutes to 45 minutes
7. Find the ratio of the following:
(a) 30 minutes to 1.5 hours (b) 40 cm to 1.5 m
(c) 55 paise to ` 1 (d) 500 mL to 2 litres
8. In a year, Seema earns ` 1,50,000 and saves ` 50,000. Find the ratio of
(a) Money that Seema earns to the money she saves.
(b) Money that she saves to the money she spends.
9. There are 102 teachers in a school of 3300 students. Find the ratio of the number
of teachers to the number of students.
10. In a college, out of 4320 students, 2300 are girls. Find the ratio of
(a) Number of girls to the total number of students.
(b) Number of boys to the number of girls.
(c) Number of boys to the total number of students.
11. Out of 1800 students in a school, 750 opted basketball, 800 opted cricket and remaining opted table tennis. If a student can opt only one game, find the ratio of
(a) Number of students who opted basketball to the number of students who opted
table tennis.
(b) Number of students who opted cricket to the number of students opting basketball.
(c) Number of students who opted basketball to the total number of students.
12. Cost of a dozen pens is ` 180 and cost of 8 ball pens is ` 56. Find the ratio of the cost of a pen to the cost of a ball pen.
13. Consider the statement: Ratio of breadth and length of a hall is 2 : 5. Complete the following table that shows some possible breadths and lengths of the hall.
14. Divide 20 pens between Sheela and Sangeeta in the ratio of 3 : 2.
15. Mother wants to divide ` 36 between her daughters Shreya and Bhoomika in the ratio of their ages. If age of Shreya is 15 years and age of Bhoomika is 12 years, find how much Shreya and Bhoomika will get.
16. Present age of father is 42 years and that of his son is 14 years. Find the ratio of
(a) Present age of father to the present age of son.
(b) Age of the father to the age of son, when son was 12 years old.
(c) Age of father after 10 years to the age of son after 10 years.
(d) Age of father to the age of son when father was 30 years old.