railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Speed Time and Distance Average Speed
A and B start to walk from point P towards point Q. The distance between P and Q is 9 km. B starts 4 minutes after A. A, on reaching Q, immediately returns and after walking a kilometre meets B. If A’s speed is a kilometre in 10 minutes, what is B’s speed in kilometres per minute?
1
1/15
2
1/8
3
1/12
4
1/6