Question

This stamp has an area of 4 square cm. Guess how many such
stamps will cover this big rectangle length 15cm breath 19cm​

Answer 1

given ,

side of the stamp = 4

therefore, area=

$(side \times side) \\ = (4 \times 4)$

given,

dimentions of the rectangle = 15cm by 19cm

therefore,area =

$(length \times breadth )\\ =( 15 \times 19)$

therefore ,number of stamps needed =

$\frac{15 \times 19}{4 \times 4} \\ = \frac{285}{16 } \\ = 17.8125 \\ = 17 \: approx$

therefore approximately 17 stamps are needed

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Answer 2

given ,

side of the stamp = 4

therefore, area=

\begin{gathered}(side \times side) \\ = (4 \times 4)\end{gathered}(side×side)=(4×4)

given,

dimentions of the rectangle = 15cm by 19cm

therefore,area =

\begin{gathered}(length \times breadth )\\ =( 15 \times 19)\end{gathered}(length×breadth)=(15×19)

therefore ,number of stamps needed =

\begin{gathered} \frac{15 \times 19}{4 \times 4} \\ = \frac{285}{16 } \\ = 17.8125 \\ = 17 \: approx\end{gathered}4×415×19=16285=17.8125=17approx

therefore approximately 17 stamps are needed

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