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lyudmila [28]
3 years ago
10

A plane can fly 1020 miles in the same time as it takes a car to go 360 miles. If the car travels 110 mph slower than the plane,

find the speed of the plane.
Mathematics
1 answer:
gayaneshka [121]3 years ago
5 0

Answer:

170 mph

Step-by-step explanation:

Let x mph be the plane's speed.

If the car travels 110 mph slower than the plane, then the car's speed is x - 110 mph.

<u>Plane:</u>

Speed = x mph

Distance = 1,020 miles

Time = t hours

1,020=x\cdot t\Rightarrow t=\dfrac{1,020}{x}

<u>Car:</u>

Speed = x - 110 mph

Distance = 360 miles

Time = t hours

360=(x-110)t\Rightarrow t=\dfrac{360}{x-110}

A plane can fly 1020 miles in the same time as it takes a car to go 360 miles, so

\dfrac{1,020}{x}=\dfrac{360}{x-110}

Cross multiply:

1,020(x-110)=360x\\ \\102(x-110)=36x\\ \\102x-11,220=36x\\ \\102x-36x=11,220\\ \\66x=11,220\\ \\x=170

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