Question

If a 4-pound roast takes 150 minutes to cook, how long should a five-pound roast take

Answer 1

188 minutes (rounded) or 187 minutes and 5 seconds 

Answer 2

First divide 150 with 4
150/4 = 37.5 
Then you have to multiply 37.5 with 5
37.5 * 5 = 187.5
So it will take 187.5 to roast!!
Hope This Helps!!