The ratio of two number is 4:5 and their L.C.M. is 100. Determine their sum ?
A. 90
B. 40
C. 50
D. 45
Answer: Option D
Solution (By Examveda Team)
Let two numbers be 4x and 5x;their LCM = 100 and HCF = x; Now,
1st number * 2nd number = LCM*HCF
Or, 4x*5x = 100*x;
Or, 20x = 100;
Or, x = 5;
then, Sum of number = 4*5 + 5*5 = 45
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