.
A semicircular tunnel has a radius of 26 ft. The highway 48 ft wide is centered under the tunnel.
a. What is the diameter of the tunnel?
b. How high is the tunnel from the edge of the highway?
~~~~~~~~~~~~~
(a) The diameter of the tunnel is twice its radius, i.e. 2*26 = 52 ft. ANSWER
(b) The height of the tunnel at its edge is
h = = = = = = 2*5 = 10 ft. ANSWER
Solved.