Answer:
ㅎ 포토 타임 왔습니다
Step-by-step explanation:
по поводу того что бы не можете дозвониться не смогла найти
The answer is -2.21428571429
So, 4 x 3 is 12, so 4 blades cost 79.74 x 3 (because every turbine has 3 blades each) is 318.96
Using the given formula T = LS
And given the time is 3 minutes (3 x 60 = 180 seconds)and the speed is 4-1/2 inches per second:
180 = L x 4-1/2
Solve for L by dividing both sides by 4-1/2:
L = 180 / 4-1/2
L = 40
The length should be 40 inches.
The answer is the 3rd option