If he sold 61/10 pitchers (I made it into a improper fraction) on friday and he sold 1/4 on saturday, then you divide 61/10 by 4. when you do this you get 61/40 which simplifies 1 and 21/40 or 1.525 pitchers on saturday
How many seconds are in 4 min 24000 so divide 4 its becomes 6000 thats 1 min. so divide by 60 it becomes 100 so he has an average speed of 1m/100seconds i think i got lost there
