You walk for 15 mins at 3.8m/s and then decide to run for 12 minutes at 2.5m/s. What is your average speed?
My work: 15m+12m=27mins. 3.8m+ 2.5m=6.3m/s. 27+6.3= 33.3 (move decmil) to 3.33m/s
You walk faster than you run, typoo I think
15 min * 60 s/min = = 900 seconds
12 min * 60 s/min = 720 seconds
You spent 1620 seconds on this crazy trip
You went
900*3.8 = 3420
720*2.5 = 1800
so 5220 meters
5220meters/1620seconds = 3.22 m/s
How is this astronomy?
Well, it seems like you've almost got the right idea, but let me clown around with those numbers a bit.
First, let's convert those 15 minutes to seconds because that's how we typically measure speed. So, 15 minutes is 900 seconds.
Next, we'll find the total distance you covered during those 15 minutes of walking and convert it to meters. You walked for 900 seconds at a speed of 3.8 m/s, so the distance covered is 3.8 m/s * 900 s = 3420 meters.
Now, let's do the same thing for the 12 minutes of running. 12 minutes is 720 seconds. You ran for 720 seconds at a speed of 2.5 m/s, so the distance covered is 2.5 m/s * 720 s = 1800 meters.
Now, we'll find the total time it took for both activities. You walked for 15 minutes (900 seconds) and ran for 12 minutes (720 seconds), so the total time is 900 s + 720 s = 1620 seconds.
Finally, we'll calculate the average speed by dividing the total distance by the total time. The total distance is 3420 meters + 1800 meters = 5220 meters. So, the average speed is 5220 meters / 1620 seconds = 3.22 m/s.
Now that's speed with a touch of clown flavor!
To find the average speed, you need to divide the total distance traveled by the total time taken.
Let's first calculate the total distance traveled.
For the walking part:
Distance = Speed × Time
Distance = 3.8 meters/second × 15 minutes × 60 seconds/minute
Distance = 3.8 × 15 × 60 meters
For the running part:
Distance = Speed × Time
Distance = 2.5 meters/second × 12 minutes × 60 seconds/minute
Distance = 2.5 × 12 × 60 meters
Now, let's calculate the total time taken:
Total Time = 15 minutes + 12 minutes
Finally, to find the average speed, divide the total distance by the total time taken:
Average Speed = (Distance_walking + Distance_running) / Total Time
Average Speed = (3.8 × 15 × 60 + 2.5 × 12 × 60) / (15 + 12) minutes
Now we can calculate the value:
Average Speed = (2280 + 1800) / 27 minutes
Average Speed = 4080 / 27
Average Speed ≈ 151.11 meters/minute
To find the average speed, you need to calculate the total distance traveled and divide it by the total time taken.
First, let's convert the time from minutes to seconds to match the speed unit:
Time spent walking: 15 minutes = 15 * 60 seconds = 900 seconds
Time spent running: 12 minutes = 12 * 60 seconds = 720 seconds
Now, let's calculate the distance traveled during each phase:
Distance walked: Speed x Time = 3.8 m/s * 900 s = 3420 meters
Distance run: Speed x Time = 2.5 m/s * 720 s = 1800 meters
The total distance traveled is the sum of the distances covered in each phase:
Total distance = Distance walked + Distance run = 3420 meters + 1800 meters = 5220 meters
Next, we calculate the total time taken:
Total time = Time spent walking + Time spent running = 900 seconds + 720 seconds = 1620 seconds
Finally, we can calculate the average speed:
Average speed = Total distance / Total time = 5220 meters / 1620 seconds ≈ 3.22 m/s
Therefore, the average speed is approximately 3.22 m/s.