The ratio of 2 numbers is 2:3 and their H.C.F. is 10. Their L.C.M. is ?  Choose the correct choice from the following options:
A) 30
B) 60
C) 20
D) 10
E) 40
Let the numbers be 2x and 3x   Their H.C.F. = 10   so the numbers are 2*10 , 3*10 = 20,30   L.C.M. = 60   Answer is 60
<result>B</result>
The ratio of 2 numbers is 2:3 and their H.C.F. is 10. Their L.C.M. is ?