Surface Areas & Volumes | Exercise 13.5 | Q1

Question 1: A matchbox measures 4 cm x 2.5 cm x 1.5 cm. What will be the volume of the packet containing 12 such boxes?

Explanatory Answer | Exercise 13.5 Q1

The matchbox is in the shape of a cuboid.
Length of the matchbox, l = 4 cm
Width of the matchbox, b = 2.5 cm
Height of the matchbox, h = 1.5 cm

Volume of cuboidal matchbox = l × b × h
= 4 × 2.5 × 1.5
= 15 cm³

Volume of a packet containing 12 matchboxes = 12 × 15
= 180 cm³

Exercise 13.1 | Surface Area of Cubes & Cuboids

1. Class 9 Exercise 13.1 Question 3 | Height of hall ▶
2. Class 9 Exercise 13.1 Question 6 | TSA of Herbarium ▶
3. Class 9 Exercise 13.1 Question 7 | Shanti Sweets ▶

Exercise 13.2 | Surface Area of Cylinders

1. Class 9 Exercise 13.2 Question 3 | CSA TSA of Metal Pipe ▶
2. Class 9 Exercise 13.2 Question 4 | Roller & Playground ▶
3. Class 9 Exercise 13.2 Question 9 | Cylindrical Petrol Tank ▶
4. Class 9 Exercise 13.2 Question 10 | CSA of Decorative Lampshade ▶

Exercise 13.3 | Surface Area of Cones

1. Class 9 Exercise 13.3 Question 5 | Length of Tarpaulin 3 m wide ▶
2. Class 9 Exercise 13.3 Question 8 | Cost of painting conical barricades ▶

Exercise 13.4 | Surface Area of Spheres & Hemispheres

1. Class 9 Exercise 13.4 Question 8 | Outer CSA of hemispherical bowl ▶
2. Class 9 Exercise 13.4 Question 9 | Surface area of sphere & Cylinder ▶