57 miles per hour. in 2 hours, and 70 What's More Direction: Solve each problem. Write the letter that corresponds to your answer on the blank to form the word that is described in the box below. One and five are done for you. Write the word in your activity notebook or any specified paper. It is a large group of sub-microscopic infectious agents that are usually regarded as non-living, exceptionally complex molecules and can cause various diseases in humans, animals, and plants. 84 kph M 2h 0.75 m/sec 380 km U 0.25 m/sec V 76 kph S 4.50 kph R V 1. A marble rolled 3.5 m in 14 seconds. Find its average speed. In a 9-kry walk-a-thon, Marina walked at an average speed of 6 kph for the first 3 km and at an average speed of 4 kph for the remaining distance. 2. How long did it take her to complete the entire walk-a-thon? ALTERNATIVE DELIVERY 3. What was her average speed? AD Arthur travelled the first 2 hours of his trip at 70 kph and the last 3 hours of his trip at 80 kph. 2 4. What is the distance covered for Arthur's entire trip? R_5. What is his average speed of travel for his entire trip?​