A400-ft equal tangent sag vertical curve has its pvc at station 100+00 and elevation 500 ft. the initial grade is -4.0% and the final frade is +2.5%. determine the elevation of the lowest point of the curve.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

idk

step-by-step explanation: