A sample of wooden aircrafts is found to undergo `9 dp m g^(-1)` of `.^(14)C`. What is appoximate age of aircraffts? The half line of `._(6)^(14)C` is `5730` year and rate of disintergration of wood recently cut down is `15 dp m g^(-1)` do `._(6)^(14)C`?

Explanation

Given, `r_(0) = 15` dpm, `r = 9` dpm, `t_(1//2) = 5730 yr`
`t = (2.303)/(lambda) log (r_(0))/(r)`
`= (2.303xx5730)/(0.693) log (15)/(9)`
`= 4224.47 yr`