Simple interest on a certain sum at the rate of 4.5% p.a. for 4 years and 6 years differs by BDT 216. The sum is
ক
BDT 2,100
খ
BDT 2,400
গ
BDT 1,800
ঘ
None
সঠিক উত্তর: BDT 2,400