To find the total weight of all the balls in milligrams (mg), we need to convert the weights of the cricket ball, basketball, and football into milligrams and then sum them all together.
### Step-by-Step Solution:
1. **Weight of the Squash Ball**:
- The weight of the squash ball is already given in milligrams:
\[
\text{Weight of squash ball} = 34,000 \text{ mg}
\]
2. **Convert the Weight of the Cricket Ball**:
- The weight of the cricket ball is given as 45 grams.
- To convert grams to milligrams, we use the conversion factor \(1 \text{ g} = 1,000 \text{ mg}\):
\[
\text{Weight of cricket ball} = 45 \text{ g} \times 1,000 \text{ mg/g} = 45,000 \text{ mg}
\]
3. **Convert the Weight of the Basketball**:
- The weight of the basketball is given as 0.65 kg.
- To convert kilograms to milligrams, we use the conversion factor \(1 \text{ kg} = 1,000,000 \text{ mg}\):
\[
\text{Weight of basketball} = 0.65 \text{ kg} \times 1,000,000 \text{ mg/kg} = 650,000 \text{ mg}
\]
4. **Convert the Weight of the Football**:
- The weight of the football is given as 3 kg.
- Using the same conversion factor:
\[
\text{Weight of football} = 3 \text{ kg} \times 1,000,000 \text{ mg/kg} = 3,000,000 \text{ mg}
\]
5. **Calculate the Total Weight**:
- Now, we can sum all the weights together:
\[
\text{Total weight} = \text{Weight of squash ball} + \text{Weight of cricket ball} + \text{Weight of basketball} + \text{Weight of football}
\]
\[
\text{Total weight} = 34,000 \text{ mg} + 45,000 \text{ mg} + 650,000 \text{ mg} + 3,000,000 \text{ mg}
\]
6. **Perform the Addition**:
- First, add the weights step-by-step:
\[
34,000 + 45,000 = 79,000 \text{ mg}
\]
\[
79,000 + 650,000 = 729,000 \text{ mg}
\]
\[
729,000 + 3,000,000 = 3,729,000 \text{ mg}
\]
### Final Answer:
The total weight of all the balls is:
\[
\text{Total weight} = 3,729,000 \text{ mg}
\]
