The L.C.M. of 2 numbers is 40. The numbers are in the ratio 4:5. Find their sum? Choose the correct choice from the following:
A) 18  B) 40  C) 48  D) 32  E) 56
Let the numbers be 4x and 5x   L.C.M. = 20x   20x = 40   x = 2   The numbers are = 8 and 10   Required sum = 8+10= 
<gadget id="calculator">8+10</gadget>
<output>18</output>
18   18nswer is 18
<result>A</result>
The L.C.M. of 2 numbers is 40. The numbers are in the ratio 4:5. Find their sum?