Question

how many dusters each 16 cm square can be cut from material 84 cm long 36 cm wide what area remains over​

Answer 1

$\bold{Area \: of \: duster \: = \: 16cm²} \\ \bold{Length \: of \: the \: material \: = \: 84cm} \\ \bold{Breadth \: = \: 36cm} \\ \bold{Area \: of \: the \: material \: = l × b} \\ \bold{ \: \: \: = 84cm \: \times \: 36cm} \\ \bold{ = 3024 {cm}^{2} } \\ \\ \bold{No. \: of \: duster \: = \: \frac{Area \: of \: the \: material }{Area \: of \: duster } } \\ \bold{ = \frac{3024 {cm}^{2}}{16cm²} } \\ \bold{= \frac{ \cancel{3024{cm}^{2}} \: \: \: \: ¹⁸⁹}{ \cancel{16cm²}}} \\ \bold{ = \: 189....</p><p>ans}$