Answer:
12
Step-by-step explanation:
The linear speed of the object is the ratio between the measure of the arc it had traveled and the time. For the length of the arc,
2π x (20 m) x (0.2 rad/ 2π rad) = 4 meters
Divide this by the time, 10 s. Thus, the linear speed is equal to 0.4 m/s.
Multiply both sides by 2.
2m = a + b
Subtract both sides by b.
2m - b = a
