Darren has borrowed 100 clams from Ethan at a 10% simple daily interest. Meanwhile, Fergie has borrowed 150 clams from Gertie at a 5% simple daily interest. In how many days will Darren and Fergie owe the same amounts, assuming that they will not make any repayments in that time period?
Darren has borrowed 100 clams from Ethan at a 10% simple daily interest. Meanwhile, Fergie has borrowed 150 clams from Gertie at a 5% simple daily interest. In how many days will Darren and Fergie owe the same amounts, assuming that they will not make any repayments in that time period?
After n days Darren will owe 100+(10% of 100)*n = 100+10n clams
After n days Fergie will owe 150+(5% of 150)*n = 150+ 7.5n clams
They will owe the same when these are equal
100+10n = 150+7.5n
2.5n = 50
n = 50/2.5
n = 200/10
n = 20 days