A car after covering ½ of a journey of 100 km develops engine trouble and late

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Question

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?

Options:

A . 50 kmph

B . 40 kmph

C . 30 kmph

D . 25 kmph

Answer: Option D

[50/x
+ 50/(x/2)] “ 100/x = 2

x = 25

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