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Question

The ratio compounds of 4:9, the duplicate ratio of 3:4, the triplicate ratio of 2:3 and 9:7 is
  1. 7:2
  2. 2:7
  3. 2:21
  4. one of these

A
7:2
B
2:21
C
2:7
D
one of these
Solution
Verified by Toppr

Duplicate of ratio 3:4=3242=9:16

Triplicate ratio of 2:3=2333=8:27

Now we have 4 ratios, i.e.,

49,916,827 and 97

Compounded ratio of these ratios =4×9×8×99×16×27×7=221

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