A car after covering ½ of a journey of 100 km develops engine trouble and later travels at ½ of its original speed. As a result, it arrives 2 hours late than its normal time. What is the normal speed of the car is?
Choose the most appropriate option
A) 15 kmph B) 25 kmph C) 28 kmph D) 29 kmph E) 21 kmph
25 kmph   25 kmph   [50/x + 50/(x/2)] – 100/x = 2   x = 25
<result>B</result>
A car after covering ½ of a journey of 100 km develops engine trouble and later travels at ½ of its original speed. As a result, it arrives 2 hours late than its normal time. What is the normal speed of the car is?