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Sav [38]
3 years ago
11

Emily and Kylie are 140 miles apart, traveling towards each other. If Kylie travels 12 mph and Emily travels 8 mph how long unti

l they meet?
Mathematics
1 answer:
Bogdan [553]3 years ago
3 0

Answer: 7 hr

Step-by-step explanation:

Given

Distance between Emily and Kylie is 140\ \text{miles}

Speed of Emily v_e=12\ mph

Speed of Kylie v_k=8\ mph

Distance traveled by Emily \Rightarrow d_e=12t

Distance traveled by Kylie \Rightarrow d_k=8t

\Rightarrow 12t+8t=140\\\Rightarrow 20t=140\\\Rightarrow t=7\ hr

They will meet after 7 hour.

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Two trapeziums are similar, thee area of one of the trapezium is 4times that of the other. Determine the ratio of the perimeter
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Answer:

The ratio of the perimeters of the two trapezium is 2

The ratio of the corresponding sides of the two trapezium is 2

Step-by-step explanation:

The given parameters in the question are;

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Let, A₁, and A₂ represent the area of the two trapeziums, we have

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Given that ratio of areas = (Ratio of sides)²

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Therefore, given that the ratio of the areas of the two trapeziums A₁/A₂ = 4, we have;

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The ratio of the perimeter = √4 = 2

The ratio of the perimeter = 2

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