How many km did Yochanan cover by walking and how many did he cover by travelling on the bus ? Yochanan walked from home to the bus stop at an average speed of 5 k m / h . He immediately got on his school bus and traveled at an average speed of 60 k m / h until he got to school. The total distance from his home to school is 35 k m , and the entire trip took 1.5 hours.
Let w be the distance walking and b be the distance on the bus. The total distance is 35 k m . w + b = 35 The total time is 1.5 hours. Each leg has time equal to the distance / speed. w 5 + b 60 = 1.5 Multiply by 60 to clear the fractions. 12 w + b = 90 Subtract the first equation. 11 w = 90 − 35 = 55 w = 5 b = 30
