Question

Adam and Henry are traveling from city X to city Y in their respective cars. Adam reaches the city in 3 hours whereas Harry reaches 45 minutes after adam. if the speed of harrys car is less than adams car by 12km/hr, find the speed of adams car

Answer 1

Adams car = 60 km/hr

Explanation:

45 minutes = .75 of an hour

(x-12) refers to harry's speed

3x = 3.75(x -12)

3X = 3.75x - 45

0.75x = 45

x = 45/0.75

x = 60

x represents Adams speed

harry's speed is 48 km/hr

the total distance to the city is 180 km

180/ 60 - 12) = 3.75