Question

how many times does rani have to run around a field 83metre long and 33metre wide ,in order to cover 812 metre​

Answer 1

Answer:

Hey mate...!!

Gud evening..

Length=83 m

Breadth=33 m

Perimeter=2(l+b)

=2(83+33)

=2 x 116

=232

$rounds = \frac{812}{232} = 3.5$

Brainliest please

Answer 2

3.5 times Rani have to run around the field.

Explanation:

It is stated that,

The length of the field = 83 meter

The breadth of the field = 33 meter

Hence,

Perimeter of the field = 2(Length + Breadth)

                                   = 2(83+33) meter

                                   = 2 × 116 meter

                                   = 232 meter

The distance covered by Rani by running one time = Perimeter of the field = 232 meter.

Hence,

232 meter is covered by Rani by running 1 time.

∴ 1 meter is covered by Rani by running (1/232) time.

∴ 812 meter is covered by Rani by running (1×812/232) times

                                                                          = 3.5 times.

Above we have done the math by unitary method. It can also be done by proportional method. Let's learn the proportional method too. But follow only one of the method which one you feel easier.

In proportional method:

Let, Rani have to run around the field to cover the distance of 812 meter be, 'n' times.

We know that, by running 1 time Rani covers a distance of 232 meter.

Since, it is in direct proportion, as the number of time increases as well as the amount of distance covered also increases.

∴ n:812 :: 1:232

⇒ n/812 = 1/232

⇒ n = 1×812/232

⇒ n = 3.5 times.

∴ Rani have to run 3.5 times around the field to cover a distance of 812 meter.

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