Answer:
Ritu can row downstream 20 km in 2 hrs. and upstream 4 km
in 2 hrs. Find the speed of rowing in still water and the speed of the current
OR
In a competitive examination, one mark is awarded for each
correct answer while mark
is deducted for each wrong answer. Sheela answered 120 questions and got 90
marks. How many questions did she answer correctly?
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