Question

12. The distance between A's house and B's house is 18 km. If A runs from his house
to B's house at 3/4th of the normal speed, he takes an hour more. What is A's
normal speed ? (in kmph)
1)8 2)5 3)7.5 4)5.5 5)6
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Answer 1

Answer:

I don't know try something different