SOLUTION: Dorcas lives 4km from school. She walks 1km at 6km /h and travels the rest of the way by bus at 30km/h A. How many minutes does the whole journey take? B. What is her average spe

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Dorcas lives 4km from school. She walks 1km at 6km /h and travels the rest of the way by bus at 30km/h A. How many minutes does the whole journey take? B. What is her average spe      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1180458: Dorcas lives 4km from school. She walks 1km at 6km /h and travels the rest of the way by bus at 30km/h
A. How many minutes does the whole journey take?
B. What is her average speed in km/h?
Found 2 solutions by josgarithmetic, greenestamps:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
4=1%2F6%2B30y

Question asks for y%2B1%2F6 in hours.

Answer by greenestamps(13203) About Me  (Show Source):
You can put this solution on YOUR website!


I don't know if you can make anything out of the cryptic response from the other tutor.... I know I can't....

The 1km walking at 6km/h takes 1/6 of an hour.

The remaining 3km are on the bus at 30km/h, taking 1/10 of an hour.

The total time for the trip is (1/6+1/10) hours, or (10+6=16) minutes.

ANSWER A.: 16 minutes

4 km in 16 minutes is 1/4 km per minute, or (60*1/4 = 15) km/h.

ANSWER B.: 15 km/hr