Question

students are taking pictures of the local environment using a photography drone. they fly the drone 2 km in the first 1 minute and 3 km in the next 4 minutes. what is the average speed of the drone during the entire trip? a. 3 km/min b. 4 km/min c. 1 km/min d. 2 km/min

Explanation:

Step1: Calculate total distance

The drone flies 2 km in the first - stage and 3 km in the second - stage. So the total distance $d = 2+3=5$ km.

Step2: Calculate total time

The first - stage time $t_1 = 1$ minute and the second - stage time $t_2 = 4$ minutes. So the total time $t=t_1 + t_2=1 + 4=5$ minutes.

Step3: Calculate average speed

The formula for average speed $v=\frac{d}{t}$. Substitute $d = 5$ km and $t = 5$ minutes into the formula, we get $v=\frac{5}{5}=1$ km/min.

Answer:

C. 1 km/min