# NCERT Solutions Class 5 Mathematics Chapter 14 How Big How Heavy

1. A stage platform is made with 5 Math-Magic books. The volume of this stage is the same as ______ cm cubes.

Ans. 546 cm.

2. Guess the volume of these things in cm cubes.

(a) A matchbox is about ___ cm cubes.

Ans. (a) 24 cm.

(b) A geometry box is about ___cm cubes.

Ans. (b) 90 cm.

(c) An eraser is about __ cm cubes.

Ans. (c) 6 cm.

2. How will you check your guess?

Ans. In case of matchbox: It is about 6 cm long, 4 cm wide and 1 cm thick. So, 6 4 1 i.e. 24 cm cubes will fit in it. Therefore, guess is correct.

In case of geometry box: It is about 16 cm long, 6 cm wide and 1 cm thick. So, 16 6 1 i.e. 96 cm cubes will fit in it.

In case of eraser: It is about 3 cm long, 2cm wide and 1 cm thick. So, 3 2 1 i.e. 6 cm cubes will fit in it.

3. Matchbox Play: Tanu is making a stage with matchboxes. She first puts 14 matchboxes like this in the first layer. She makes 4 such layers and her stage looks like this.

(a) She used __ matchboxes to make this stage.

Ans. (a) 4 14 = 56.

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