A policeman noticed a criminal from a distance of 180 km. The criminal starts running and the policeman chases him. The criminal and the policeman run at the rate of 8 km and 9 km per hour respectively. What is the distance between them after 3 minutes ?
Choose the correct choice from the following
A) 100 m
B) 120 m
C) 130 m
D) 150 m
E) None of these
Explanation :   Solution: Relative speed = (9 - 8)= 
<gadget id="calculator">(9 - 8)</gadget>
<output>1</output>
1 km/hr.   Distance covered in 3 minutes= (1 * 3/60) km = 1/20 km = 50 m.   .'. Distance between the criminal and policeman = (180 - 50)= 
<gadget id="calculator">(180 - 50)</gadget>
<output>130</output>
130 m.   Answer : 130 m
<result>C</result>
A policeman noticed a criminal from a distance of 180 km. The criminal starts running and the policeman chases him. The criminal and the policeman run at the rate of 8 km and 9 km per hour respectively. What is the distance between them after 3 minutes ?