1. Two men starting from the same place walk at the rate of 5 km/hr and 5.5 km/hr respectively. What time will they take to be 8.5 km apart, if they walk in the same direction?

A. 4 hrs 15 min B. 8 hrs 30 min C. 16 hrs D. 17 hrs

Answer Answer: Option D Explanation: To be 0.5 km apart, they take 1 hour.
To be 8.5 km apart, they take (1/0.5*8.5) hrs = 17 hrs.

2. A is twice as fast as B and B is thrice as fast as C is. the journey covered by C in 54 minutes will be covered by B in?

A. 18 min B. 27 min C. 38 min D. 9 min

Answer Answer: Option A Explanation: Let C's speed = x km/hr. then, B's speed = 3x km/hr and A 's speed = 6x km/hr.
Hence, ratio of speed of A,B,C = 6x : 3x : x = 6 : 3: 1.
Ratio of times taken = 1/6 : 1/3 : 1= 1 : 2 : 6.
If C takes 6 min., then B takes 2 min.
If C takes 54 min., then B takes (2/6*54) min. = 18 min.

4. 2 men start together to walk to a certain destination, one at 3 km/hr and another at 3.75 km/hr.The later arrives half an hour before the former.The distance is?

A. 6 km B. 7.5 km C. 8 km D. 9.5 km

Answer Answer: Option B Explanation: Let the distance be x km then
x/3- x/3.75 = 1/2 = 2.5x - 2x = 3.75
x = 3.75/0.50 = 15/2 = 7.5km

5. With a uniform speed a car covers the distance in 8 hours.Had the speed been increased by 4km/hr, The same distance could have been covered in 7 1/2 hrs.What is the distance covered?

A. 420 km B. 480 km C. 640 km D. None of these

Answer Answer: Option B Explanation: Let the distance be x km then
x/7 1/2 - x/8 =4 = 2x/15 - x/8 = 4 = x = 480km