Josh needs to drive from Kelly's Kitchen to Gary's Grocery. If Josh drives the shortest distance possible on the roads shown above at a constant speed of 30 miles per hour, how long does it take him to make the trip from Kelly's Kitchen to Gary's Grocery?
A. 6 minutes
B. 10 minutes
C. 12 minutes
D. 20 minutes
Answer:C
Josh needs to drive from Kelly's Kitchen to Gary's Grocery. If Josh drives the shortest distance possible on the roads shown above at a constant speed of 30 miles per hour, how long does it take him to make the trip from Kelly's Kitchen to Gary's Grocery?
A. 6 minutes B. 10 minutes C. 12 minutes D. 20 minutes
Explanation: C First, count the number of blocks that Josh needs to drive. He needs to drive 4 blocks north and 6 blocks east for a total of 10 blocks. You need to convert this into miles, which can be done with the following proportion: . The drive is a total of 6 miles. Since Josh drives at 30 miles per hour, you can set up a second proportion: . Cross-multiply and solve to get that x = or of an hour. This equals 12 minutes in (C).