7th Standard Syllabus & Materials
7th Standard
TN 7th Tamil பருவம் -1 இயல் 1 - அமுதத்தமிழ் - ஒன்றல்ல இரண்டல்ல Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
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TN 7th English T1 - Poem - Your Space Important Questions And Answers Study Material - QB365 Set A
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TN 7th English T1 - Prose - A Prayer to the Teacher Important Questions And Answers Study Material - QB365 Set A
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Published on: 16/06/2021
QB365 provides detailed and simple solution for every book back questions in class 7 Maths subject.It will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 7th Standard Maths question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Maths Test1.
The radius of a tractor wheel is 77 cm. Calculate the distance covered by it in 35 rotations? (use \(\pi =\frac { 22 }{ 7 } \))
2.
What is the distance travelled by the tip of the seconds hand of a clock in 1 minute, if the length of the hand is 56 mm (use \(\pi =\frac { 22 }{ 7 } \)).
3.
If the circumference of the circle is 132 m. Then calculate the radius and diameter (Take \(\pi =\frac { 22 }{ 7 } \)).
4.
What is the circumference of the circular disc of radius 14 cm? (use \(\pi =\frac { 22 }{ 7 } \))
5.
Calculate the circumference of the bangle shown in Figure (Take p = 3.14 ).
1.
The distance covered in one rotation
= the circumference of the circle
= 2πr units
= 2 x \(\frac { 22 }{ 7 } \) x 77
= 2 x 22 x 11
= 484 cm
The distance covered in one rotation = 484 cm
The distance covered in 35 rotations = 484 x 35
= 16940 cm
2.
Here the distance travelled by the tip of the seconds hand of a clock in 1 minute is the circumference of the circle and the length of the seconds hand is the radius of the circle. So, r = 56 mm
Circumference of the circle, C = 2πr units
= 2 x \(\frac { 22 }{ 7 } \) x 56
= 2 x 22 x 8
= 352 mm
Therefore, distance travelled by the tip of the seconds hand of a clock in 1 minute is 352 mm.
3.
Circumference of the circle, C = 2πr units
The circumference of the given circle = 132 m
\(\frac { C }{ 2\pi } =r\)
r = \(\frac { 132 }{ 2\times \frac { 22 }{ 7 } } \)
= \(\frac { 132 }{ 2 } \times \frac { 7 }{ 22 } \)
= 21 m
d = 2r
= 2 x 21
= 42 m
4.
Radius of circular disc (r) = 14 cm
Circumference of the disc = 2πr units
= 2 x \(\frac { 22 }{ 7 } \) x 14
= 88 cm
5.
Given, d = 6 cm, d = 2r = 6 cm, r = 3 cm
Circumference of a circle = 2πr units
= 2π × 3
= 18.84
The circumference is 18.84 cm.
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Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
