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तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ७

The ratio of the area of a circle to the area of its semicircle is - Mathematics

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प्रश्न

The ratio of the area of a circle to the area of its semicircle is

पर्याय

  • 2 : 1

  • 1 : 2

  • 4 : 1

  • 1 : 4

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उत्तर

The ratio of the area of a circle to the area of its semicircle is 2 : 1

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Measurements - Exercise 2.2 [पृष्ठ ३४]

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सामाचीर कलवी Mathematics - Term 2 [English] Class 7 TN Board
पाठ 2 Measurements
Exercise 2.2 | Q 11 | पृष्ठ ३४

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A lawn is in the form of a rectangle whose sides are in the ratio 5 : 3. The area of the lawn is `3375m^2` . Find the cost of fencing the lawn at ₹ 65 per metre.


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What is the angle subtended at the centre of a circle of radius 6 cm by an arc of length 3 π cm?


If the perimeter of a semi-circular protractor is 36 cm, then its diameter is 


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Area of a rectangle and the area of a circle are equal. If the dimensions of the rectangle are 14 cm × 11 cm, then radius of the circle is ______.


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If the radius of a circle is tripled, the area becomes ______.


Read the following passage:

People of a circular village Dharamkot want to construct a road nearest to it. The road cannot pass through the village. But the people want the road at a shortest distance from the centre of the village. Suppose the road starts from A which is outside the circular village (as shown in the figure) and touch the boundary of the circular village at B such that AB = 20 m. Also the distance of the point A from the centre O of the village is 25 m.

Based on the above information, answer the following questions:

  1. If B is the mid-point of AC, then find the distance AC.
  2. Find the shortest distance of the road from the centre of the village.
  3. Find the circumference of the village.
    OR
    Find the area of the village.

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