Tis your sister's birthday and you are preparing a family meal. the joint of meat needs to be cooked for 30 minutes per 500 g plus an extra 20 minutes. how long will it take to cook a joint of meat weighing 2.5 kilograms?

1 kg = 1000 gso 2.5 kg = (2.5 * 1000) = 2500 grams

it cooks 30 minutes per 500 g2500/500 = 5...so there are 5 thirty minute periods (5 * 30) = 150 minutesplus the extra 20 minutes(150 + 20) = 170 minutesso your answerr is 2 hrs 50 minutes