SOLUTION: Walking at 3/4 of her usual speed, Molly arrives at her destination 2.5 hours late. What is her usual time for walking this distance?

Question 737833: Walking at 3/4 of her usual speed, Molly arrives at her destination 2.5 hours late. What is her usual time for walking this distance?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I will say that usually her motion equation is
(1)
When she walks at 3/4 her usual speed,
her equation is:
(2)
--------------------------
The only units given are hours
I can say unit, miles or what ever, so
(1)
(2)
--------------------------
(2)
Substitute (1) into (2)
(2)
(2)
(2)
(2)
(2)
and, since
(1)
(1)
(1)
(1)
Her usual time is 7.5 hrs
check:
(2)
(2)
(2)
(2)
Hope I got it

RELATED QUESTIONS
Walking at 6/7th of his usual speed, a man is 25 mins too late. His usual time... (answered by josmiceli)

Walking 3/4 of his usual speed , a student is 1o minutes late to his school. find his... (answered by lwsshak3)

Bev takes a train home at 4:00, arriving at the station at 6:00. Every day, driving at... (answered by ikleyn)

By walking 3/4th of his usual speed, a man reaches his office 20 minutes later than... (answered by khwang)

To train for a marathon, Mei runs an 18-mile course at constant speed. If she doubles her (answered by ankor@dixie-net.com)

amy drove 200 miles at an average speed 10 miles per hour faster than her usual speed. if (answered by stanbon,mamiya)

Walking 6/7th of his usual speed, a man is 12 minutes too late. The usual time taken by... (answered by ankor@dixie-net.com)

If one walks 500 feet at 4 miles per hour walking to his/her destination and walks back... (answered by drk,oberobic)

A wife picks up her husband after work at a certain hour every day. (It takes the same... (answered by ankor@dixie-net.com)