Answer:
To find the distance from B to C, we can use the formula:
\[ \text{Distance} = \text{Speed} \times \text{Time} \]
For the segment between A and B:
\[ \text{Distance}_{AB} = \text{Speed}_{AB} \times \text{Time}_{AB} \]
\[ \text{Distance}_{AB} = 70 \, \text{km} \]
For the segment between C and D:
\[ \text{Distance}_{CD} = \text{Speed}_{CD} \times \text{Time}_{CD} \]
\[ \text{Distance}_{CD} = 48 \, \text{km} \]
The total distance from A to D via B and C is the sum of these two distances:
\[ \text{Distance}_{AD} = \text{Distance}_{AB} + \text{Distance}_{CD} \]
Now, you can calculate the distance from B to C:
\[ \text{Distance}_{BC} = \text{Distance}_{AD} - \text{Distance}_{AB} \]
Substitute the given values and calculate the distance from B to C.
