A line cuts two concentric circles. The length of chords formed by this line on the circles is 6 cm and 18 cm. Find the difference in the squares of the radii of two circles.
A policeman is chasing a thief at a speed of 82 km/h. The thief is 1300 m away and is running at a speed of 64 km/h. In how much time will the policeman catch the thief if both are riding on bikes?
English Comprehension
The given sentence is divided into four segments. Select the option that has the segment with a grammatical error. Jerry driving / home late / when the incident / took place.