a rectangular grassy plot 110 m. by 65 m has a gravel path 2.5 m wide all round it on the inside. find the cost of gravelling the path at 30 paise per sq. metre  Choices
A) s 255  B) s 780  C) s 880  D) s 480  E) s 980
<gadget id="calculator">110 * 65</gadget>
<output>7_150</output>

<gadget id="calculator">2.5 * 2</gadget>
<output>5</output>

<gadget id="calculator">110 - 5</gadget>
<output>105</output>

<gadget id="calculator">65 - 5</gadget>
<output>60</output>

<gadget id="calculator">105 * 60</gadget>
<output>6_300</output>

<gadget id="calculator">7_150 - 6_300</gadget>
<output>850</output>

<gadget id="calculator">850 * 30</gadget>
<output>25_500</output>

<gadget id="calculator">25_500 / 100</gadget>
<output>255</output>

<result>A</result>
a rectangular grassy plot 110 m. by 65 m has a gravel path 2.5 m wide all round it on the inside. find the cost of gravelling the path at 30 paise per sq. metre
divide(multiply(subtract(multiply(110, 65), multiply(subtract(110, multiply(2.5, const_2)), subtract(65, multiply(2.5, const_2)))), 30), const_100)
"area of the plot = 110 m * 65 m = 7150 sq . m area of plot excluding gravel = 105 m * 60 m = 6300 sq . m area of gravel = 7150 sq . m - 6300 sq . m = 850 sq . m cost of building it = 850 sq . m * 30 = 25500 p in rs = 25500 / 100 = rs 255 answer : a"