Answer:
To achieve 100% delivery within 1 hour with an average delivery time of 40 minutes, you need to consider the time it takes for each delivery.
1. Each delivery takes 40 minutes.
2. You have 60 minutes in 1 hour.
To find out how many deliveries a single rider can complete in 1 hour, divide the total time (60 minutes) by the average delivery time (40 minutes):
\[ \frac{60 \text{ minutes}}{40 \text{ minutes/delivery}} = 1.5 \text{ deliveries} \]
This means each rider can complete 1.5 deliveries in 1 hour.
Now, to achieve 100% delivery for 100 orders, divide the total number of orders by the deliveries per rider:
\[ \frac{100 \text{ orders}}{1.5 \text{ deliveries/rider}} \approx 66.67 \text{ riders} \]
Since you can't have a fraction of a rider, you would need to round up to ensure you have enough riders to handle all the orders. Therefore, you would need approximately 67 delivery riders to achieve 100% delivery within 1 hour.