Q 29 ans 11 dusters ; 208 cm2
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Q.29. How many dusters, each 16 cm square can be cut from material 84 cm long and 36 cm wide? What area remains over?

Dear Student,

$$\begin{gathered} 1) Calculate area of material: \\ Area= 84 \times 36 = 3024c{m}^2 \\ 2) Calculate how many dusters we can make \\ side of square duster=16cm \\ Area of 1 duster = 16\times 16 = 256c{m}^2 \\ No. of dusters = \frac{3024}{256}= 11.8125 \\ As dusters can\text{'}t be in fraction, we take 11 dusters \\ So, Area left = 3024-(area of 11 dusters) \\ =3024-\left(11\times 256\right) \\ =3024-2816 \\ =208 c{m}^2 \end{gathered}$$


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