With a uniform speed a car covers the distance in 8 hours. Had the speed been increased by 1 km/hr, the same distance could have been covered in 7 1/2 hours. What is the distance covered?
Select
A) 187 km  B) 480 km  C) 278 km  D) 120 km  E) 671 km
Let the distance be x km. Then,   x/(7 1/2) - x/8 = 1   2x/15 - x/8 = 1 =&gt; x = 120 km.   Answer:120 km
<result>D</result>
With a uniform speed a car covers the distance in 8 hours. Had the speed been increased by 1 km/hr, the same distance could have been covered in 7 1/2 hours. What is the distance covered?