6 - same time if the same ratio of machines to widgets
6 minits, if ech machine takes a minute to make 1 widget so 60 machines all working at the same time would make 1 widget(x60) after 6 mins
i don't know if 6 machines make 6 widgets or 6 widgets each
It is so tempting to say 60 minutes (1hour)but this is one of those trick questions that when you know the correct answer, you think, Oh yeah !
60 minutes in theory but without all the variables it is impossible to say with certainty absolute certainty.
I have attached my resume for the position

what time of day do you call dinner for me its between 12-2pm ?
Baked mackerel with Mediterranean vegetables and saffron rice. It was delicious. With home made roll poly and custard. The custard was not home made though. Sorry. Then a cup of coffee later.
vegetable burger and curly fries with a salad
bacon egg mushrooms and potato croquetts
Fish in sauce, boiled potatoes and broccoli
Sandwich Cheese and pickle plus a home made cake.
pasta with tomato sauce, orange, yoghurt
Baked potato with cheese, salad and sausages
Fish fingers, beans and chipped potatoes
Roast beef, roast potatoes, broccoli, carrots
Buffalo Burger, Jersey Royal new potatoes and a green salad
Mixed tandoori kebab.Chicken dansak,chips poppadom
gammon steak and new potatoes with a cheese sauce
Five bean spicy salad wild rice and pork
lamb steak, mash, cabbage and runner beans
sandwiches, crisps, seafood, yogurt, fruit, biscuits
Sunday lunch chicken veg potatoes and gravy
veggie burgers, sweetcorn, mangetout and green beans
bbq'd pork loin steaks and sausages, with veggie kebabs, air fried chips and salad
grilled fish and sweet potato wedges and salad
two cheese salad rolls and a bowl of cherries
Peppered steak with potatoes and grated carrot and houmus ontop.
Soup, chickpea and kidney bean and a salad
Jacket potatoes with tuna, avocado and salad
Rice, BBQ beans, sweetcorn and cornbread
nothing I had a light lunch and a supper of cheese sandwiches
cannot remember, mixture of meat in a stirfry and rice, i think
Salmon potatoes green beans and garden peas
gnocchi with bacon, aubergine, spinach and tomato sauce
Breaded chicken, potato waffles and peas
Bran flakes with blueberries, chopped banana and no fat yoghurt
steck, garlic and rosemary potatoes, roasted tomatoes and mashrooms.
freshly baked salmon with buttered boiled potatoes, carrots and broccoli
Roast chicken and roasted vegetables with steamed broccoli
Sweet potato, broad beans, tomato and veggie burger
vegetarian quorn, fried vegetables and rice.
pitta bread stuffed with cheese and salad
Roast lamb shanks, sweet potato and peppers
Roast lamb, creamed onions, roast potatoes, cabbage, carrots, red current jelly, sherry trifle
Chickpeas and salad sans Ajax_Ñés abs pjra
Yorkshire pudding, Sausage, cabbage and potatoes with strawberry sponge with cream for dessert.
Roast dinner chicken potatoes broccoli gravy
Beef stew dumplings potatoes and vegetables
The answer to the last question was 6, I can't go back. I ate rice.
ham and tomato sandwich. strawberries,  yogurt and jelly