Question

can you tell me please that how (d/20)+(d/30)becomes (d/12) ?

Answer 1

this is the explanation that why d/12 has come. Mark me brainliest if I'm right.

thank you.

Answer 2

d/20+ d/ 30

LCM of 20 and 30= 60

therefore,

(d ×3)/(20×3) = 3d/60

(d× 2 )/( 30×2)= 2d/60

now,

=3d/60 + 2d/60

=5d/60

=d/12.

hope it helps you...