Find the ratio compounded of the duplicate ratio of 5 : 6, the reciprocal ratio of 25 : 42 and the sub-duplicate ratio of 36 : 49.

Sum

Duplicate ratio of 5 : 6 = 25 : 36

Reciprocal ratio of 25 : 42 = 42 : 25

Sub-duplicate ratio of 36 : 49 = 6 : 7

Required compound ratio = `(25 xx 42 xx 6)/(36 xx 25 xx 7)` = 1 : 1

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Chapter 7: Ratio and Proportion (Including Properties and Uses) - Exercise 7 (D) [Page 102]

Chapter 7 Ratio and Proportion (Including Properties and Uses)
Exercise 7 (D) | Q 4.(vi) | Page 102

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