Two numbers are in ratio 4:5 and their LCM is 180. The smaller number is	Choose the correct choice from the following choices:
A) 9 B) 15 C) 36 D) 45 E) None
Solution: Let two numbers be 4x and 5x;   their LCM = 180 and HCF = x; Now,   1st number * 2nd number = LCM*HCF   Or, 4x*5x = 180*x;   Or, 20x = 180;   Or, x = 9;   then, the smaller number = 4*9= 
<gadget id="calculator">4*9</gadget>
<output>36</output>
36.   Answer: Option 36
<result>C</result>
Two numbers are in ratio 4:5 and their LCM is 180. The smaller number is