The car drove for 30 minutes. At a speed of 72 km / h How fast must a car go to cover the same section
| August 19, 2021 | education
The car drove for 30 minutes. At a speed of 72 km / h How fast must a car go to cover the same section of the road in 20 minutes?
t1 = 30 min.
V1 = 72 km / h
t2 = 20 min.
V2 -?
S = V1 * t1.
S = V2 * t2.
V1 * t1 = V2 * t2.
V2 = V1 * t1 / t2.
V2 = 72 km / h * 30 min / 20 min = 108 km / h.
Answer: the car must move at a speed of V2 = 108 km / h.
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