A bus travelled on a level road at an average speed of 20 mpg faster than it did on a winding road. The time spent on the winding road was 3 hours. Find the average speed on the level road if the entire trip was 396 miles.

i think it is 18

step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

answer: the answer is 110