4. one car drives 32 km every 15 minutes. another drives 120km in 1 hour. use equivalent ratios to decide…

4. one car drives 32 km every 15 minutes. another drives 120km in 1 hour. use equivalent ratios to decide which is going faster. hint: use equivalent ratios to make the minutes the same, then compare the km

4. one car drives 32 km every 15 minutes. another drives 120km in 1 hour. use equivalent ratios to decide which is going faster. hint: use equivalent ratios to make the minutes the same, then compare the km

Answer

Explanation:

Step1: Convert time to same unit

1 hour = 60 minutes.

Step2: Find equivalent ratio for first car

The first car drives 32 km in 15 minutes. To find the distance in 60 minutes, set up the proportion $\frac{32}{15}=\frac{d}{60}$. Cross - multiply: $15d = 32\times60$, so $d=\frac{32\times60}{15}=128$ km.

Step3: Compare distances

The first car drives 128 km in 60 minutes and the second car drives 120 km in 60 minutes.

Answer:

The first car is going faster.