A boy walked 20 minutes at 3km/hr and ran 20 minutes at 15km/hr. The total distance covered by the boy is -

Question: A boy walked 20 minutes at 3km/hr and ran 20 minutes at 15km/hr. The total distance covered by the boy is - Solution:first 20 minutes he covered = 3 × 20/60 km= 1kmin the second 20 minutes, he covered = 15 × 20/60 km= 5kmtotal distance = 1 + 5 = 6km