what is the cost of leveling a triangular portion of land with sides 72m 30m and 78m respectively at the rate of 20 paisa per square meter!!
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what is the cost of leveling a triangular portion of land with sides 72m 30m and 78m respectively at the rate of 20 paisa per square meter!!
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Answer:
Rs. 216
Step-by-step explanation:
A triangular piece of land whose sides are 72 m 30 m and 78,
Let a= 72m , b=30m , c=78m
Now, S= (a+b+c)/2 =72+30+78 = 180/2 = 90 m
Using herons formula,
Area= Ös(s-a)(s-b)(s-c)
Area = Ö90(90-72)(90-30)(90-78)
= Ö1166400 = 1080 m2
It is done at a rate of 20 paisa per metre, cost of leveling the triangle,
= 20*1080 = 21600 paisa
1 rupee = 100 paisa
21600 paisa = 21600/100 = 216 Rs