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Question
A path $$1\ m$$ wide is built along the border and inside a square garden of side $$30\ m.$$ Find the cost of planting grass in the remaining portion of the garden at the rate of Rs. $$40$$ per $$m^2.$$
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Solution
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Area of the portion having grass is $$=(30-1-1)m=28m$$
Area of remaining portion$$=28\times 28=784m^2$$
The cost of planting grass in $$1m^2$$ of the garden$$=$$Rs. $$40$$
The cost of planting grass in $$784m^2$$ of the garden$$=$$Rs. $$40\times 784=$$Rs. $$31,360$$.
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Q1
A path 1m wide is built along the border an inside a square garden of side 30m. Find the cost of planting grass in the remaining portion of the garden at the rate Rs. 40 per m2.
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Q2
A path 1 m wide is built along the border and inside a square
garden of side 30 m. Find:
(i) the area of the path
(ii) the cost of planting grass in the remaining portion of the
garden at the rate of Rs 40 per m2.