Question

The cost of laying grass in a rectangular park at the rate of 10 per sq m is 4800 find the cost of constructing its boundary at the rate of 800 per meter if the park is 20 m wide

Answer 1

$<b>Heya mate. (^_-). Solution below.$
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• Cost of laying 1 m² of grass = 10 Rs.

• Total cost of laying grass = 4800 Rs.


• So, area of the rectangular park

= total cost/cost of laying

= 4800/10

= 480 m²



• Now, given width of the rectangular park = 20 m


• We know that area of rectangle = l × b


• Therefore, length of rectangular park

= Area/ breadth

= 480/20

= 24 m



• Now, Perimeter of the rectangular park

= 2 (length + breadth)

= 2 (24 + 20)

= 2 × 44

= 88 m


• Now, cost of constructing boundary for 1 m = 800 Rs.

So, cost of constructing boundary for 88 m = 88 × 800 = 70,400 Rs.

$<marquee>Hence, your answer is 70400 Rs.</marquee>$
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Thank you.. ;-)