Answer:
Total distance traveled by bird is 10.5 km.
Step-by-step explanation:
Given that,
Velocity of runner= 8.4 km/hr
Distance = 6.3 km
Velocity of bird = 42 km/hr
Suppose, How far does the bird travel?
We need to calculate the time of bird
Using formula of time

Put the value into the formula


We need to calculate the distance runner travels during time period
Using formula of distance



We need to calculate the distance of runner to FL
Using distance


We need to calculate the net closing speed between runner and bird
Using speed



We need to calculate the time for runner and bird to meet
Using formula of time

Put the value into the formula


We need to calculate the distance covered by runner
Using formula of distance

Put the value into the formula


We need to calculate the distance covered by bird to runner
Using formula of distance

Put the value into the formula


We need to calculate the total distance
Using distance

Hence, Total distance traveled by bird is 10.5 km.