Question

(a) 9:20
(6) 3:5
(c) 5:3
(d) 20 : 9
40. If A:B = 7: 9 and B: C = 5 : 4, then A:B:C is
(a) 7:45:36
(b) 28 : 36 : 35
(c) 35 : 45 : 36
(d) None of these
41. If A:B = 2:3, B: C = 4:5 and C:D = 6:7, then
A:B:C:D is
(a) 16 : 22 : 30 : 35 (b) 16:24 : 15 : 35
(C) 16:24 : 30 : 35 (d) 18:24 : 30 : 35
12. If A:B =
11
-:- and B: C= -:-, then A:B:C is
2 3
equal to
(a) 1:2:6
(6) 2:3:3
2 31​

Answer 1

Step-by-step explanation:

(40).A:B=7:9,B:C=5:4

A. B. C

7. 9.

5. 4

7×5. 9×5. 9×4

35. 45. 36

Ans----- option (c)

(41).A:B=2:3,B:C=4:5,C:D=6:7

A. B. C. D

2. 3

4. 5

2×4. 3×4. 3×5

8. 12. 15.

6. 7

8×6. 12×6. 15×6. 15×7

8×2. 12×2. 15×2. 5×7

16. 24. 30. 35

Ans-----option(c)

question 12 th values have not mentioned clearly so I have not done that problem