ran at 10 km per hr then back at 4 km per hour. If it took 7 hrs, how far was it

Question

Carlos rode a bike to town at 10 kilometers per hour and then walked back at 4 kilometers per hour. If the round trip took him 7 hours, how far was it to town?

Answer 1

go x distans at 10km/our, then bak at 4 km/our, time=7 ours

(x/10) +(x/4)=7 ours

2x +5x=140

7x=140

x=20 km

out=20/10=2 ours, bak=20/4=5 ours, sum=7 ours

Answer 2

Tampons