Answer:
72feet/min
Step-by-step explanation:
The following were obtained from the question:
Distance = 54 yards
But: 1yard = 3feets
Therefore, 54 yards = 54 x 3 = 162feets
Time = 135secs
Recall: 60secs = 1mins
Therefore, 135secs = 135/60 = 2.25mins
The rate of the Zebra = Distance /time
The rate of the Zebra = 162/2.25 = 72feet/min
The law of cosines is:
c² = a² + b² - 2abCos(C)
Therefore, in order to apply this law, we must know the value of two adjacent sides, represented by a and b here, and the value of their subtended angle, represented by C.
I have a picture of the work for it but I don’t know how to upload it I can put a file maybe!
Opposite sides of angles are equal so
x+12=4x-48
12+48=4x-x
60=3x
x=60/3
x=20
