Answer:
280 minutes or 4.66 hours
Explanation:
we know,
1 kg =1000 g
4 kg =(4 x 1000) g =4000 g
now,
a turkey should cook for 20 minutes per 500g.plus 15 minutes extra at the end.
so,
500g turkey should cook for total =(20+15) minutes
=35 minutes
so,1g turkey should cook for total = (35/500) minutes
so, 4000g turkey should cook for total = (35/500 x 4000) minutes
=280 minutes
=(280/60) hours
=4.66 hours