The diff. in compound interests earned on a certain sum,for which interest is compounded annually,in the first and second year is rs. 140.If rate becomes thrice the original rate,then the diff. in the amount would be?

The diff. in compound interests earned on a certain sum,for which interest is compounded annually,in the first and second year is rs. 140.If rate becomes thrice the original rate,then the diff. in the amount would be?