The IGST amount in the following transaction, if amount and GST rate are as given in the diagram is .
Rupees 4000 amount to Rs. 5000 in 8 years: in what time will Rs. 2100 amount to Rs. 2800 at the same rate?
Rupees 4000 amounts to rupees 5000 in 8 years in what time will rupees 2100 become rupees 2800 at the same rate?