Selina Concise Class 10 Math Chapter 7 Ratio and Proportion Solutions Exercise 7 (C) (Q1) If a:b = c:d, prove that: (i) 5a + 7b : 5a – 7b = 5c + 7d : 5c – 7d (ii) (9a + 13b) (9c – 13d) = (9c + 13d (9a – 13b) (iii) xa […]
Selina Concise Class 10 Math Chapter 7 Ratio and Proportion Solutions Exercise 7 (C) (Q1) If a:b = c:d, prove that: (i) 5a + 7b : 5a – 7b = 5c + 7d : 5c – 7d (ii) (9a + 13b) (9c – 13d) = (9c + 13d (9a – 13b) (iii) xa […]