a) To find the total weight that the donkeys must pull, we first need to calculate the weight of the loaded cart.
- The weight of the donkey cart: 45 kg
- The weight of the mealies:
- Each sack weighs 6 kg.
- There are 19 sacks.
- Total weight of mealies = 19 sacks × 6 kg/sack = 114 kg.
Now, add the weight of the cart and the mealies together:
\[ \text{Total weight} = \text{weight of cart} + \text{weight of mealies} = 45 , \text{kg} + 114 , \text{kg} = 159 , \text{kg} \]
So, the total weight that the donkeys must pull is 159 kg.
b) To find the total weight of fodder for a week, we need to calculate the daily weight and then multiply that by the number of days in a week.
- The daily weight of the bale of fodder: 35 kg
- There are 7 days in a week.
Now calculate the total weight for the week:
\[ \text{Total weight for a week} = \text{daily weight} \times 7 , \text{days} = 35 , \text{kg} \times 7 = 245 , \text{kg} \]
So, the total weight of fodder for a week is 245 kg.