An object travels 30 m in 4 s and then another 70 m in 6 s. What is the average speed of the object ?

Options

A. `8" ms"^(1)`
B. `10" ms"^(1)`
C. `10" ms"^(-1)`
D. `8" ms"^(-1)`

Answer

To find the average speed of the object, we can follow these steps:

### Step 1: Calculate the total distance traveled
The object travels two distances:
- First distance = 30 m
- Second distance = 70 m

**Total Distance = First Distance + Second Distance**
Total Distance = 30 m + 70 m = 100 m

### Step 2: Calculate the total time taken
The object takes two time intervals:
- First time = 4 s
- Second time = 6 s

**Total Time = First Time + Second Time**
Total Time = 4 s + 6 s = 10 s

### Step 3: Calculate the average speed
The formula for average speed is given by:
**Average Speed = Total Distance / Total Time**

Substituting the values we calculated:
Average Speed = 100 m / 10 s = 10 m/s

### Final Answer:
The average speed of the object is **10 m/s**.

---