VII MATHS Ratio and Proportion
Definitions : A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0. A proportion is an equation in which two ratios are set equal to each other. Assignment Question 1-
Find the ratio of the following:
(a) 63 to 45
(b) 256 to 512
(c) 66 km to 121 km
(d) 3 minutes to 45 minutes
(e) ½ hour to 45 minutes
(f) 1cm to 10 mm
(g) 45 paise to Re1
(h) 100 mL to 2 litre
Question 2- In a School, out of 1220 students, 300 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.
Question 3- Cost of a dozen bananas is Rs 180 and cost of 8 lemons is Rs 56. Find the ratio of the cost of a banana to the cost of a lemon. Question 4- Determine if the following are in proportion. (a) 25, 75, 80, 240
(b) 11, 121, 9, 99
(c) 12, 144, 25, 625
(d) 32, 48, 70, 210
(e) 4, 6, 8, 12
(f) 33, 44, 75, 100
Question 5- Determine if the foll...