Starting at home, Ishaan traveled uphill to the grocery store for 15 minutes at just 10 mph. He then traveled back home along the same path downhill at a speed of 40 mph. What is his average speed for the entire trip from home to the grocery store and back?
+680 Average speed is equal to total distance divided by total time. Total distance is 5 miles (going and returning). The formula is distance equals speed times time. Try figuring out the rest.
