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Given: a circle with Centre o. AB and CD are two chords of the circle which substance Angle AOB and angle COD at the centre o To prove: angle AOB = angle COD Proof: in triangle AOB and triangle COD OA =OC. RADII OF CIRCLE OB=OD. RADII OF CIRCLE AB=CD. GIVEN TRIANGLE AOB CONGRUENT TO TRIANGLE TO COD Angle AOB = angle COD. CPCT HENCE PROVED

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A cube and cuboid having the same volume the dimension of cuboid are in ratio 1: 2: 4 is a difference between the cost of polishing the cuboid and cube at the rate of rupees 5 per metre square is rupees 80 find the edge of the cube

Posted by Jay Patel 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Sia ? 4 years, 6 months ago

Let each side of cube be ′a′ m.

Ratio of sides of cuboid is 1:2:4.

Let the sides be ′x′ m

Volume of cube= volume of cuboid

∴ a³= x × 2x × 4x = 8x³
a³= 8x³ ⇒ a = 2x
A/Q [6a²− 2(lb+lh+bh)] × 5 = 80
{6 × (2x)² + 2[2x²+ 8x²+ 4x²]}×5=80
⇒ [−24x²+ 2(14x²)] × 5 = 80
⇒ (−24x²+ 28x²) × 5 = 80
⇒ 4x²× 5 = 80
⇒ 20x²= 80
⇒ x²= 4
⇒ x = 2
∴ a = 2 × 2= 4

∴ Volume of cube = (4)³ = 64m³

sides of cuboid = x,2x,4x = 2,4,8m

Volume of cuboid = 2×4×8 = 64m³

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17-25×1/100 - 5 of 1/5÷1/2

Posted by Kritika Bhatt 7 years, 9 months ago

CBSE > Class 09 > Mathematics

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Theorem of circles chapter with proof?

Posted by Shree S 7 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Nivedhitha Gouda 7 years, 9 months ago

Which theorem

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How do we know that when we cut the line above numberline or below numberline.... Based on ch. 11

Posted by Udit Setia 7 years, 9 months ago

CBSE > Class 09 > Mathematics

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If 125*×25÷5*find x value

Posted by Guruvachan Singh 7 years, 9 months ago

CBSE > Class 09 > Mathematics

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2/3and 3/5

Posted by Deepak O 7 years, 9 months ago

CBSE > Class 09 > Mathematics

3 answers

Anurag Mishra 7 years, 9 months ago

Maybe we can do like this Equal the denominator by LCM You will obtain 15 So it will be written as 2/15 and 3/15 Then how much rational number you want find for eg- 5 or 6 So do this.. multiple it by 10 2/15*10/10. And. 3/15*10/10 20/150. And. 30/150 Now you got 21/150, 22/150, 23/150, 24/150 25/150, 26/150 Thats it you got your solution

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Anushka Dongre 7 years, 9 months ago

What is the full question deepak

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Radhe Yadav 7 years, 9 months ago

So ????????????????

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Plz explain how to find even no. Median step by step

Posted by Gazal Dixit 7 years, 9 months ago

CBSE > Class 09 > Mathematics

4 answers

Aisha Jain 7 years, 9 months ago

Phle ques.ko ascending ya descending order mein kr Lena ...ohk

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Aisha Jain 7 years, 9 months ago

Lets suppose total no. Be 10 then ...Sbse phle aap .....( 10/2) + (10/2+1)/2 kro...................... (5)the term + (6)the term /2 ................ Aap ques.mein Jo 5 no .pe ar 6 no.PR digit ho unse plus krnA then divide by 2

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Aisha Jain 7 years, 9 months ago

Its formula is (n/2)th term + (n/2+1)th term /2

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Gazal Dixit 7 years, 9 months ago

Jaldi bata do bhai

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Explain splitting middle term properly

Posted by Nikhil Zimo 7 years, 9 months ago

CBSE > Class 09 > Mathematics

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Factorise: a cube- b cube +1+ 3ab

Posted by Bhawana Chauhan 7 years, 9 months ago

CBSE > Class 09 > Mathematics

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Parts of stomach ??

Posted by Jatin Singh 7 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Dabas Jaat✅ 7 years, 9 months ago

The stomach is a muscular organ located on the left side of the upper abdomen. ... As food reaches the end of the esophagus, it enters the stomach through a muscular valve called the lower esophageal sphincter. The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach.

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What is formula of volume of cuboid

Posted by Tanu Kumari 7 years, 9 months ago

CBSE > Class 09 > Mathematics