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Eleri wants to be fit for the adventure holiday. She runs 2 laps of a running track. Each lap is 400 m. Eleri thinks she has run 1 km in total. Is Eleri correct? Show why you think this.

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Eleri wants to be fit for the adventure holiday. She runs 2 laps of a running track. Each lap is 400 m. Eleri thinks she has run 1 km in total. Is Eleri correct? Show why you think this.

Eleri wants to be fit for the adventure holiday. She runs 2 laps of a running track. Each lap is 400 m. Eleri thinks she has run 1 km in total. Is Eleri correct? Show why you think this.

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SylvesterExpert · Tutor for 3 years

Answer

Eleri is incorrect. Infact, she ran 0.8km, not 1km.

Explain

## Step 1<br />### The given information is Eleri has run 2 laps, where each lap measures 400 meters (400m). We need to find the total distance Run by Eleri by performing this calculation. <br /><br />### **Formula:** Total Distance = Number of laps * Distance per lap <br />## Step 2<br />Calculate the total distance ran by Eleri. <br /><br />## Step 3<br />After getting the total distance ran by Eleri, we need to convert this from meters to kilometers to check Eleri's thought process against her total run. In 1 kilometer, there are 1000 meters, so we need to account for this conversion. <br /><br />### **Formula for Conversion:** Distance in km = Distance in m / 1000 <br />## Step 4<br />Compare the kilometer value we got from conversion to Eleri's thought.<br /><br /># Calculation<br />## For Step 2:<br />We multiply the number of laps by the distance per lap (\(2 * 400m\))<br />Which gives us 800m.<br /><br />## For Step 3:<br />We need to convert this distance to kilometres, so we divide the total distance by 1000 (\(800m / 1000\))<br />This gives us 0.8km.
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