A. If a/4 = b/5 = c/9 , prove that a + b + c = 2
B. Monthly incomes of two persons Ram and Rahim are in the ratio 5:7 and their monthly expenditures are in the ratio 7:11. If each of them saves 60 per month. Find their monthly income.
C. Find the value of x when x is an mean proportional between: (i)x-2 and x+6 (ii) 2 and 32
D. The ratio of the present age of mother to her daughter is 5:3. Ten years hence the ratio would be 3:2, Find their present ages
E. If A:B = 2:3, B:C = 4:5, then A:C =
(a) 6:7 (b) 7:6 (c) 8:15 (d) 15:8