Question

please answer me fast answer explain in copy​

Answer 1

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Answer 2

Answer:

It's total cost is RS. 6468

Step-by-step explanation:

First we have to find the inside and outside distance.

For inside distance :

Given:

diameter = 140m

radius = 140 = 70m

2

circumference = 2πr [ π = 22 / 7 ] [ r = 70 ]

= 2 × 22 × 70 = 440 m

7

For outside distance :

As 7m width is constructed around the inside

distance which is outside distance .

so we have to add 7m with the radius of inside distance , to find the radius of outside distance .

so , radius =70 + 7 m

radius = 77 m

circumference = 2πr [ π = 22 / 7 ] [ radius = 77 m ]

= 2 × 22 × 77 = 484 m

7

Now we find the total length

total length = 440m + 484m

= 924 m

Now, according to the question

we have to find its total cost if rate is at ₹ 7 per m

total cost = 7 × 924 m

= ₹ 6468

Hence the total cost is rs. 6468