SOLUTION: A man can walk at 4 km/h or jog at 6 km/h . He is going to a place 30 km away. He can cover half of the distance by walking and the other half by jogging. He can also walk half of
Algebra.Com
Question 696393: A man can walk at 4 km/h or jog at 6 km/h . He is going to a place 30 km away. He can cover half of the distance by walking and the other half by jogging. He can also walk half of the time and jog half of the time. Which method takes less time, and by how much lesser?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A man can walk at 4 km/h or jog at 6 km/h . He is going to a place 30 km away. He can cover half of the distance by walking and the other half by jogging. He can also walk half of the time and jog half of the time. Which method takes less time, and by how much lesser?
:
Find the time walking half and jogging half; time = dist/speed
t = +
t = +
t = 55/12
t = 4.458 hrs
:
Find the time,jogging half the time, walking half the time
let t = total time, write a distance equation; dist = speed * time
.5t(4) + .5t(6) = 30
2t + 3t = 30
5t = 30
t = 30/5
t = 6 hrs
RELATED QUESTIONS
A man started on a walk 12 km. After walking half the distance at x km/h, he decreased... (answered by ankor@dixie-net.com)
A man covers distance of 120 km from town A to Town B at an average speed x km/h. If he... (answered by josgarithmetic)
A man drives a car a distance of 200 km at an average speed of 44 km/h. What must be his... (answered by Edwin McCravy)
A man can cover a certain distance in 2 hours 45 minutes if he walks at a rate of 4 km/h. (answered by drk)
a man walks at 6 kmph and runs at 8 kmph he covers 6 km in 50 minutes partly by running... (answered by MathTherapy)
A man travels a distance at a speed of 12 km/h and returns at 9 km/h. If the total time... (answered by ikleyn,greenestamps)
a man is walking at a speed of 10 km/hr.after every km he takerest for 5 min.how much... (answered by Cromlix)
a man cover 15 km in 3 hours, partly by walking and partly by cycling. If he walks 3km/h... (answered by josmiceli)
A tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. (answered by josgarithmetic)