Question

a rectangular grassy plot 100 M by 70 M has a gravel path 2.5 M wide all around it on the inside find the cost of travelling the path at 90paise per square metre

Answer 1

Area of rectangle is Length × Breadth
$= 100 \times 70 = 7000m^{2} \\ now \: the \: area \: of \: smaller \: rectangle \: = 100 - 5 = 95\: and \: 70 - 5 = 65 \\ area \: = 65 \times 95 = 6175 {m}^{2} \\ subtrcting \: 7000 {m}^{2} - 6175 {m}^{2} = 925 {m}^{2} \\ cost \: of \: travelling \: is \: 90 \: paise \: per \: m^{2} \\ then \: 925 \times 0.90 = 832.50 \: rupees$
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