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

In the formula, C = 2πr, ‘r’ refers to

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प्रश्न

In the formula, C = 2πr, ‘r’ refers to

पर्याय

  • circumference

  • area

  • rotation

  • radius

MCQ
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उत्तर

In the formula, C = 2πr, ‘r’ refers to radius

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पाठ 2: Measurements - Exercise 2.1 [पृष्ठ २८]

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सामाचीर कलवी Mathematics - Term 2 [English] Class 7 TN Board
पाठ 2 Measurements
Exercise 2.1 | Q 10 | पृष्ठ २८

संबंधित प्रश्‍न

An elastic belt is placed around the rim of a pulley of radius 5 cm. (Fig. 10) From one point C on the belt, the elastic belt is pulled directly away from the centre O of the pulley until it is at P, 10 cm from the point O. Find the length of the belt that is still in contact with the pulley. Also find the shaded area (use π = 3.14 and `sqrt3=1.73)`


The length of minute hand of a clock is 14 cm. Find the area swept by the minute hand in one minute. (Use π = 22/7)


An arc of a circle is of length 5π cm and the sector it bounds has an area of 20 π cm2. Find the radius of the circle.


The radius of a sector of a circle is 7 cm. If the measure of the arc of the sector is - three right angles; find the area of the sector in case.


The circumference of a circle is equal to the sum of the circumference of two circles having diameters 36 cm and 20 cm. The radius of the new circle is ______.


Find the area of the circle if its circumfence is 88 cm.


The radii of two circles are 48 cm and 13 cm. Find the area of the circle which has its circumference equal to the difference of the circumferences of the given two circles.


Find the radius and area of the circle which has circumference equal to the sum of circumferences of the two circles of radii 3 cm and 4 cm respectively.


The radius of a circular plot is 7.7 metres. How much will it cost to fence the plot with 3 rounds of wire at the rate of 50 rupees per metre?


Circumferences of two circles are equal. Is it necessary that their areas be equal? Why?


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