linda walked 2 hours and ran for 1 hour. if she runs three times faster than she walks and the total journey is 20 kilometres, then how fast does she run?
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Answer:
15km/hr
Step-by-step explanation:
for 2hr she walked x km.
then for 1hr she ran for 3x km.
total distance=20 km
x+3x=20km
4x=20km
then x=20/4=5km
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