The length of the rectangular section is 200 m more than the width, and the width is one-half of the length

| January 9, 2021 | education

The length of the rectangular section is 200 m more than the width, and the width is one-half of the length. How long does it take for a boy to go around this section if his speed is 6 km / h.

Let’s designate the length of the section as “x” meters.
It is known that the width is 1/2 (one half) of the length, respectively, the width is equal to “1 / 2x”.
Considering that the length of the section is 200 meters longer than the width, we will make an equation.
x – 1 / 2x = 200,
1 / 2x = 200,
x = 200 / 1/2 = 200 * 2 = 400 meters length of the section.
Then the width will be equal to 400 – 200 = 200 meters.
Let’s find the perimeter of the site.
2 * (400 + 200) = 1200 m = 1.2 km.
At a speed of 6 km / h, the boy will go around this section in:
1.2 / 6 = 0.2 hours = 12 minutes.



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