Question

If two numbers are in ratio 6:13 and their least common multiple is 312 the sum of the number is

Answer 1

let ratio 6 13 be 6x 13x
lcm=312
lcm of 6x 13x=6×13×x
6×13×x=312
78×x=312
312/78=x
x=4
now 4×6+4×13
24+52=76
=76