The rate (r) of the car varies inversely with the time (t). The car travels at a rate of 40kph for 2 hours.
Find the rate of the car when it took 1 hour to travel the same distance (d).
A. 60kph
B. 70kph
C. 80kph
D. 90kph
Find the rate of the car when it took 1 hour to travel the same distance (d).
A. 60kph
B. 70kph
C. 80kph
D. 90kph
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Answer:
C. 80 kph
Step-by-step explanation:
Inverse Variation
solve for k
r = k
t
40 = k
2
k = 40(2)
k = 80
solve for r(rate)
r = k
t
r = 80
1
r = 80 kph