Q: A runner's average speed reduces by 25% every hour. If he runs 16 km in the first hour and he runs for 3 hours, then what is his overall average speed?
(a)12 km/hr
(b)12.33 km/hr
(c)10.33 km/hr
(d)13 km/hr
Correct Answer: (b)
The correct answer is (a) '12 km/hr'. This question from the Quantitative Aptitude & Data Interpretation domain tests knowledge of Numerical Ability.