Answer:
He spent 5km walking and 30km on the bus
Explanation:
This is the complete question;
Yochanan walked from home to the bus stop at an average speed of 5 km / h. He immediately got on his school bus and traveled at an average speed of 60 km / h until he got to school. The total distance from his home to school is 35 km, and the entire trip took 1.5 hours.
How many km did Yochanan cover by walking and how many did he cover by travelling on the bus?
solution;
In this question, we have a student who journeyed by walking and also by using a bus, we are asked to calculate the number of kilometers traveled using both means.
We proceed as follows;
Firstly, let’s represent the number of kilometers he walked by x and the number of kilometers he traveled on the bus by y.
Mathematically;
x + y = 35 ••••••••••(i)
Now we know that total distance is 60km at a time of 1.5hours.
Total time = total distance/total time
Time taken to walk = x/5
Time used on the bus = y/60
Adding both will give the total time of 1.5 hours
x/5 + y/60 = 1.5
12x + y = 90 •••••••••(ii)
let’s subtract i from ii
11x =55
x = 55/11 = 5km
Recall x + y = 35
y = 35-5
y = 30km