Find the best solutions to your problems with the help of IDNLearn.com. Our platform offers detailed and accurate responses from experts, helping you navigate any topic with confidence.
Speed is a rate at which an object moves. In the given question, the original speed is 128.7 km/h.
The speed of an object is the rate at which the object moves. So that:
speed = [tex]\frac{distance}{time}[/tex]
distance = speed x time
Let his original speed be represented by v.
Then:
Distance covered = 240 km
Speed = v + 8.4 km/h
Time = 105 (1.75 hours)
Thus,
240 = (v + 8.4) x 1.75
= 1.75v + 14.7
240 - 14.7 = 1.75v
v = [tex]\frac{225.3}{1.75}[/tex]
= 128.743
v = 128.7 km/h
Therefore the original speed to cover that distance is 128.7 km/h.
Visit: https://brainly.com/question/18660562