time taken to complete the journey= 10 hour
time taken in first half= 10km/hr
=50km in 5hr
time taken in second half = 15 km / hr
= 75km in 5 hr
therefore Total distance covered =50+75=125km in 10 hr
answer is 120km
Step-by-step explanation:Let the total distance of marathan race=X km.
and total time taken=10hours.
half of race completes with the speed of 10km/h and 15km/h...
time = distance/speed
then, T1+T2=10 hours.
hence, the total distance of marathan race=120km.
ask the question properly as it is not understandable