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Maximum distance between source and destination si called

A family planning a weekend trip decides to spend no more than a total of 8 hours driving. By leaving early in the morning, they can average 40 miles per hour on the way to their destination. Due to the heavy Sunday traffic they average only 30 miles per hour on the return trip. What is the farthest distance from home the can plan to go? 120 miles or less Between 120 and 140 miles 140 miles Between 140 and160 miles

A, B and C are on a trip by car. A drives during the first hour at an average speed 50 "km"//"hr" . B drives during the next 2 hours at an average speed of 48 "km"//"hr" . A and C drives during the next 3 hours at an average speed of 52 "km"//"hr" and they reached the destination in 6 hours. Their mean speed is:

A and B started at the same time from the same place for a certain destination. B walking at (5)/(6) of A's speed reached the destination 1 hour 15 minutes after A Breached the destination in