Question

The least number of square tiles that will be needed to pave a plot 225 m by 30 m is ___________ (A) 30 tiles (B) 15 tiles (C) 25 tiles (D) 45 tiles

Answer 1

Answer:

$225 = 30 \times 7 + 15 \\ 30 = 15 \times 2 + 0$

hcf(225,30)=15

(B). 15 tiles

Answer 2

Answer:

Option (A) 30 tiles is correct.

Step-by-step explanation:

HCF (225, 30) = 15

So, size of tile = 15 x 15

Therefore,

Number of tiles = 225 x 30 / (15 x 15)

= 30 tiles

The least number of square tiles that will be needed to pave a plot 225 m by 30 m is 30 tiles .  

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