Rohit and rahul start from the same point and move away from each other at right angle. After 4 hours they are 80 km apart. If the speed of rohit is 4 kmph more than rahul, then what is the speed of rohit?
a. 16 kmph
b. 20 kmph
c. 12 kmph
d. No
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the answer will be a 16 kmph.
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