The cost to fill a square playground with sand at the rate of Rs. 160

1.	The cost to fill a square playground with sand at the rate of Rs. 160 per hectare is Rs. 1440. The cost of putting a fence around it at the rate of 75 paise per meter is 1). Rs. 9002). Rs. 18003). Rs. 3604). Rs. 810
Answer» We know, 1 hectare = 10000 square meter Total COST to fill it with sand = Rs. 1440 Cost to fill PER hectare is Rs. 160 ∴ Area of the field = $(\frac{{1440}}{{160}})$ hectare = 9 hectare = 9 × 10000 square meter If length of playground is L meter then its area is L² square meter ∴ L²= 9 × 10000 ⇒ L = √ (9 × 10000) = 300 meter Perimeter of the square playground is 4L meter = 4 × 300 =1200 meter The cost of putting a FENCE around it at the rate of 75 paise per meter is = Rs. (1200 × 0.75) = Rs. 900

The cost to fill a square playground with sand at the rate of Rs. 160 per hectare is Rs. 1440. The cost of putting a fence around it at the rate of 75 paise per meter is 1). Rs. 9002). Rs. 18003). Rs. 3604). Rs. 810

Answer»

We know, 1 hectare = 10000 square meter

Total COST to fill it with sand = Rs. 1440

Cost to fill PER hectare is Rs. 160

∴ Area of the field =

$(\frac{{1440}}{{160}})$ hectare = 9 hectare = 9 × 10000 square meter

If length of playground is L meter then its area is L² square meter

∴ L²= 9 × 10000

⇒ L = √ (9 × 10000) = 300 meter

Perimeter of the square playground is 4L meter = 4 × 300 =1200 meter

The cost of putting a FENCE around it at the rate of 75 paise per meter is

= Rs. (1200 × 0.75) = Rs. 900

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The cost to fill a square playground with sand at the rate of Rs. 160 per hectare is Rs. 1440. The cost of putting a fence around it at the rate of 75 paise per meter is 1). Rs. 9002). Rs. 18003). Rs. 3604). Rs. 810

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