A train covers a distance of 100km in 1 hour. If its speed is decreased by 30km/hr, the time taken by the car to cover the same distance will be?  Options:
A) 1hr
B) 1hr 25min
C) 50min
D) 1hr 30min
E) 1hr 45min
Speed = 100/1= 
<gadget id="calculator">100/1</gadget>
<output>100</output>
100km/hr   New speed= 100-30= 
<gadget id="calculator">100-30</gadget>
<output>70</output>
70 km/hr   Time taken= 100/70 = 1hr 25min   Answer is 1hr 25min
<result>B</result>
A train covers a distance of 100km in 1 hour. If its speed is decreased by 30km/hr, the time taken by the car to cover the same distance will be?