## RS Aggarwal Class 9 Solutions Chapter 13 Volume and Surface Area Ex 13B

These Solutions are part of RS Aggarwal Solutions Class 9. Here we have given RS Aggarwal Class 9 Solutions Chapter 13 Volume and Surface Area Ex 13B.

**Other Exercises**

- RS Aggarwal Solutions Class 9 Chapter 13 Volume and Surface Area Ex 13A
- RS Aggarwal Solutions Class 9 Chapter 13 Volume and Surface Area Ex 13B
- RS Aggarwal Solutions Class 9 Chapter 13 Volume and Surface Area Ex 13C
- RS Aggarwal Solutions Class 9 Chapter 13 Volume and Surface Area Ex 13D

**Question 1.**

**Solution:**

Radius of the base of a cylinder (r) = 5cm.

and height (h) = 21cm

**Question 2.**

**Solution:**

Diameter of the base of the cylinder = 28cm

Radius = \(\frac { 1 }{ 2 } \) x 28 = 14 cm

Height (h) = 40cm.

**Question 3.**

**Solution:**

Radius of cylinder (r) = 10.5cm

Height (h) = 60cm.

**Question 4.**

**Solution:**

Diameter of cylinder = 20cm

Radius (r) = \(\frac { 20 }{ 2 } \) = 10cm

**Question 5.**

**Solution:**

Curved surface area of cylinder = 4400 cm²

Circumference of its base = 110 cm

**Question 6.**

**Solution:**

The ratio of the radius and height of a cylinder = 2:3

Volume =1617 cm³

Let radius = 2x

and height = 3x.

**Question 7.**

**Solution:**

Total surface area of the cylinder = 462 cm²

Curved surface area = \(\frac { 1 }{ 3 } \) x 462 = 154

**Question 8.**

**Solution:**

Total surface area of solid

cylinder = 231 cm²

**Question 9.**

**Solution:**

Sum of radius and height = 37m.

and total surface area = 1628 m²

Let r be the radius

**Question 10.**

**Solution:**

Total surface area = 616 cm²

Curved surface area = \(\frac { 616X1 }{ 2 } \) = 308

**Question 11.**

**Solution:**

Volume of gold = 1 cm³

diameter of wire = 0.1 mn

**Question 12.**

**Solution:**

Ratio in the radii of two cylinders = 2:3

and ratio in the heights = 5:3

If r1 and r2 and the radii and h1 and h2 are the heights, then

**Question 13.**

**Solution:**

Side of square = 12cm

and height = 17.5cm

**Question 14.**

**Solution:**

Diameter of cylindrical bucket = 28cm

Radius (r) = \(\frac { 28 }{ 8 } \) = 14cm

Height (h) = 72cm.

**Question 15.**

**Solution:**

Length of pipe (l) = 1m = 100cm

diameter of pipe = 3cm.

Inner radius = \(\frac { 3 }{ 2 } \) cm

**Question 16.**

**Solution:**

Internal diameter of cylindrical tube = 10.4 cm

Radius (r) = \(\frac { 10.4 }{ 2 } \) = 5.2cm.

**Question 17.**

**Solution:**

Length of barrel (h) = 7cm

Diameter = 5mm.

**Question 18.**

**Solution:**

Diameter of pencil = 7mm

.’. Radius (R) = \(\frac { 7 }{ 2 } \) mm = \(\frac { 7 }{ 20 } \) cm.

and diameter of graphite in it = 1mm

Hope given RS Aggarwal Class 9 Solutions Chapter 13 Volume and Surface Area Ex 13B are helpful to complete your math homework.

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