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ganeshie8 (ganeshie8):
30 minutes is half hour
ganeshie8 (ganeshie8):
in one hour she walks 5km => in half hour she walks 5/2 = 2.5 km
OpenStudy (anonymous):
\[30 \min. \rightarrow hrs. = (30\div60) => 0.5hrs.\]\[5km/hr (speed) \times 0.5hrs = 2.5km\] She walked 2.5km under 30 minutes.
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