Answers

2016-01-16T18:58:49+05:30
Its 21 cm as ratio of 12 and 9 is 3/4 so multiply 3/4 to 28 u get what is 21 cm

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2016-01-16T19:14:55+05:30
Sorry for bad handwriting

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Please..........Best answer
i did say the same
Sorry i didnt notice