Samacheer Kalvi 6th Maths Solutions Term 1 Chapter 3 Ratio and Proportion Ex 3.4

Samacheer Kalvi 6th Maths Solutions Term 1 Chapter 3 Ratio and Proportion Ex 3.4

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 1 Chapter 3 Ratio and Proportion Ex 3.4

Question 1.
Fill in the blanks.
(i) If the cost of 3 pens is ₹ 18, then the cost of 5 pens is ____
(ii) If Karkuzhali earns ₹ 1800 in 15 days, then she earns ₹ 3000 in ___ days
Solution:

Question 7.
The number of correct answers given by Kaarmugilan and Kavitha in a quiz competition is in the ratio 10 : 11. If they had scored a total of 84 points in the competition, then how many points did Kavitha get?
Solution:
Correct answers given by Kaarmugilan and Kavitha are in the ratio 10 : 11
Total of 84 points will be divided into 10 + 11 = 21 equal parts
Points scored by Kavitha = 11/21×84 = 44 points
Kavitha scored 44 points in the quiz.

Question 8.
Karmegam made 54 runs in 9 overs and Asif made 77 runs in 11 overs. Whose run rate is better? (run rate = ratio of runs to overs)
Solution:
Karmegam Runs made in 9 overs = 54
Runs made in 1 over = 54/9 = 6 runs
Asif
Runs made in 11 overs = 77
Runs made in 1 over = 77/11 = 7 runs
∴ Asif’s run rate is better than Karmegam.

Question 9.
You purchase 6 apples for ₹ 90 and your Mend purchases 5 apples for ₹ 70. Whose purchase is better?
Solution:
In my purchase cost of 6 apples = ₹ 90
Cost of 1 apple = 90/6 = ₹ 15
In my friend’s purchase cost of 5 apples = ₹ 70
Cost of 1 apple = 70/5 = ₹ 14
My friend buy for lower prize.
My friend’s purchase is a better buy.

Objective Type Questions

Question 10.
If a Barbie doll costs Rs 90, then the cost of 3 such dolls is Rs …….
(a) 260
(b) 270
(c) 30
(d) 93
Solution:
(b) 270

Question 11.
If 8 oranges cost ₹ 56, then the cost of 5 oranges is ₹ _____
(a) 42
(b) 48
(c) 35
(d) 24
Solution:
(c) 35
Hint:
Cost of 1 Orange = 56/8 = ₹ 7
Cost of 5 Orange = 7 × 5 = ₹ 35

Question 12.
If a man walks 2 km in 15 minutes, then he will walk ………. km in 45 minutes.
(a) 10
(b) 8
(c) 6
(d) 12
Solution:
(c) 6