Question

(d) If the thickness of each english book is 3 cm, then the height of each stack of english

books is

(i) 120 cm (ii) 124 cm (iii) 136 cm (iv) 144 cm​

Answer 1

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Answer 2

Given : Thickness of each English book is 3 cm,

To Find :  the height of each stack of English can be :

(i) 120 cm (ii) 124 cm (iii) 136 cm (iv) 144 cm​

Solution:

Thickness of each English book is 3 cm,

Let say Number of books  = N

Height of stack of N books = 3N  cm

3N = 120

=> N = 40

Hence 120 cm can be height of each stack of English

3N = 124

=> N = 41.33

Books must be in integer hence not possible

3N = 136

=> N = 45.33

Books must be in integer hence not possible

3N = 144

=> N = 48

Hence 144 cm can be height of each stack of English

height of each stack of English can be  120 cm or 144 cm

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