To avoid paying a toll on a direct road. I go west 10km , south 5km,west 30 km and north 35km. What is the length of the toll road?
A
45
B
40
C
50
D
60
Correct Answer: 50
I drive west 10 miles, south 5 miles, west 30 miles, and north 35 miles = west 40 miles, north 30 so we get, (30)² + (40)² = n² or,900 + 1600 = n² or,2500 = n² ∴n = 50 or - 50 Throwing out the negative answer, we get the distance to be 50 miles ans: 50 miles