Asked by mukesh
A girl walks 12 km at the speed of 3 km/h. what change should she make in her speed to take (i) an hour less and (ii) an hour more to cover the distance?
Answers
Answered by
Henry
d = r*t = 12 km
3 * t = 12
t = 4 h
1. d = r*t = 12
r * 3 = 12
r = 4 km/h
Change = 4 - 3 = 1 km/h = 1 km/h increase.
2. d = r*t = 12 km
r * 5 = 12
r = 2.4 km/h.
Change = 2.4 - 3 = -0.6 km/h = 0.6 km/h
decrease.
3 * t = 12
t = 4 h
1. d = r*t = 12
r * 3 = 12
r = 4 km/h
Change = 4 - 3 = 1 km/h = 1 km/h increase.
2. d = r*t = 12 km
r * 5 = 12
r = 2.4 km/h.
Change = 2.4 - 3 = -0.6 km/h = 0.6 km/h
decrease.
Answered by
Anonymous
bakvas
Answered by
Annabella#INDIA
It really helped me!!
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