Learn Insta try to provide online math tutoring for you. (ii) the weight of metal B and the weight of the alloy. The angles of a triangle are in the ratio 3 :2 : 7. Question 3. Selina Publishers Concise Mathematics Class 10 ICSE Solutions Chapter 7 Ratio and Proportion (Including Properties and Uses) Ratio and Proportion Exercise 7A – Selina Concise Mathematics Class 10 ICSE Solutions. Question 8. New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 7 Ratio and Proportion and Unitary Method Self Practice 7A Solution (1) Express each of the following ratios in its simplest form. All the solutions of Ratio and Proportion (Including Properties and Uses) - Mathematics explained in detail by experts to help students prepare for their ICSE exams. If you have any doubts, please comment below. Answer: Ratio between the prices of scooter and a refrigerator = 4:1 Cost price of scooter = ₹45,000 Let the cost of scooter = 4x Cost of refrigerator = 1x According to condition, Cost of scooter > Cost of refrigerator ⇒ 4x- 1x = 45000 ⇒ 3x = 45000 x = \(\frac { 45000 }{ 3}\) ⇒ x = ₹15000 .’. ICSE SolutionsSelina ICSE SolutionsML Aggarwal Solutions. Ten gram of an alloy of metals A and B contains 7.5 gm of metal A and the rest is metal B. Also, find the ratio of the number of females to the whole population. Divide 64 cm long string into two parts in the ratio 5 : 3. Find each angle. Solution: HCF of 66 and 18 is 6. (iv) 40 … We provide step by step Solutions of Exercise / lesson-6 Ratio and Proportion for ICSE Class-7 Concise Selina Mathematics. Answer, Two numbers are in the ratio 4 : 7. Answer: A’s age = 6 years 8 months = 6 x 12 + 8 = 72 + 8 = 80 months B’s age = 7 years 4 months = 7 x 12 + 4 = 84 + 4 = 88 months ∴ Ratio between them = 80 : 88 = 10 : 11 Amount = Rs. is 16. 320 y’s share =\(\frac { 5 }{ 9 }\) of Rs. = 11 : … = 168 Let first number = 4x and second number = 7x Now, L.C.M. Hope given Selina Concise Mathematics Class 10 ICSE Solutions Chapter 7 Ratio and Proportion Ex 7B are helpful to complete your math homework. Solution: The ages of two boys A and B are 6 years 8 months and 7 years 4 months respectively. Question 1. Solution: a : b = 3 : 5. 40,000 respectively. Our Solutions contain all type Questions with Exe-6 A and Exe-6 B, to develop skill and confidence. Express each of the given ratio in its simplest form : Divide 64 cm long string into two parts in the ratio 5 : 3. Their sum is 168. Unitary Method (Including Time and Work) 8. Answer. = 16 ⇒ x = 16 ∴Required numbers = 5x and 9x = 5×16 and 9×16 = 80 and 144. Find the value of x in each of the following such that the given numbers are in proportion. Find the fourth proportional of, Question 3. Ratio and Proportion (Including Sharing in a Ratio) 7. Answer, Find the mean proportional between 810, find the second. Ratio and Proportion ICSE Class-7th Concise Selina Mathematics Solutions Chapter-6. Find the mean proportional between. Answer: Total weight of A and B metals = 10 gm A’s weight = 7.5 gm B’s weight = 10 – 7.5 = 2.5 gm, (i) Ratio between A and B = 7.5 : 2.5 = \(\frac { 75 }{ 10 }\) : \(\frac { 25 }{ 10 }\) =3:1, (ii) Ratio between B and total alloy = 2.5 : 10 = \(\frac { 25 }{ 10 }\) : 10 ⇒ 25 : 100 = 1 : 4. Profit, Loss and Discount 10. (ii) the share of A and the share of B. Question 5. of 4x and 7x = 4 x 7 x x = 28x ∴ 28x = 168 x = \(\frac { 168 }{ 28 }\) x = 6 ∴ Required numbers = 4x and 7x = 4 x 6 = 24 and 7 x 6 = 42. Answer, is divided between A and B in such a way that A gets half of B. Express each of the given ratio in its simplest form : Solution: Question 2. Find the fourth proportional to: (i) 1.5, 4.5 and 3.5 (ii) 3a, 6a2 and 2ab2. Find the numbers. If the ratio between the numbers of ₹10 and ₹20 notes is 2 : 3; find the total number of notes in all. The ratio between two quantities is 3 : the first is Rs. Find the share of each. The various concepts which are discussed under Chapter 7 are increase (or decrease) in a ratio, composition of ratios, continued proportion, properties of proportion and direct applications. Question 9. 1080. Find the fourth proportional of Solution: Question 3. How many rupees will each get?Answer. Question 22. Answer, In a class, the ratio of boys to the girls is 7:8. Check whether the following quantities form a proportion or not ? is 168, find the numbers. Question 16. Answer, A plot of land, 600 sq m in area, is divided between two persons such that the first person gets three-fifth of what the second gets. 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