With a uniform speed a car covers the distance in 8 hours. Had the speed been increased by 4 km/hr, the same distance could have been covered in 7 1/2 hours. What is the distance covered?
Choose the correct choice from the following answers:
A) 347
B) 480
C) 288
D) 278
E) 131
Let the distance be x km. Then,   x/(7 1/2) - x/8 = 4   2x/15 - x/8 = 4 =&gt; x = 480 km.   Answer: 480
<result>B</result>
With a uniform speed a car covers the distance in 8 hours. Had the speed been increased by 4 km/hr, the same distance could have been covered in 7 1/2 hours. What is the distance covered?