Carcass wrote:
Jack and Mack start simultaneously towards each other from two places which are 1260 km apart. They travel with respective speeds of 130 kmph and 122 kmph. What is the total distance they covered in the last minute before they cross each other?
A. 2.8 km
B. 3.4 km
C. 3.6 km
D. 4.2 km
E. 5.0 km
For this question we can make nor the information about Jack and Mack being 1260 km apart when they first started.
Every HOUR the gap between them shrinks by 252 km (130 + 122 = 252)
So, in 1 MINUTE, the gap shrinks by 252/60 km
252/60 = 42.2
Answer: D