HCF of two numbers 70 and 84 can be expressed in the form of (20m – 126) whereas LCM of these two numbers can be expressed in the form of (50n – 30). Find the ratio of (n × m).
HCF of 70 and 84 = 14 LCM of 70 and 84 = 420 According to the question, => 20m – 126 = 14 => m = 7 And, 50n – 30 = 420 => n = 9 Required answer = n x m = 63
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