Math, asked by ANMOLKUMARgupta20059, 1 year ago

A road 3.5 m wide surrounded a circular plot whose circumference is 44m.find the cost of paving the road at ruppes 20​

Answers

Answered by rekhasushil78
0

Answer:

Rs. 9625 

Step-by-step explanation:

Solution:-

Let the 'r' and 'R' be the radii of the inner and outer circle respectively.

Circumference of the circle = 44 m

2πr = 44

2*22/7*r = 44

r = (44*7)/44

r = 7 m

So, the radius of the inner circle is 7 m

Width of the road = 3.5 m

So, radius of the outer circle = 7 + 3.5 = 10.5 m

Area of the road = πR² - πr²

= 22/7*10.5*10.5 - 22/7*7*7

= 346.5 - 154

Area of the road = 192.5 sq m

Cost of paving the road = Rs. 50 per sq m

Total cost of paving the road = 192.5 × 50

Total cost = Rs. 9625 


ANMOLKUMARgupta20059: thanks my friend
ANMOLKUMARgupta20059: where do live
rekhasushil78: u welcome
ANMOLKUMARgupta20059: you
rekhasushil78: this is personal imformation
rekhasushil78: not related to study
ANMOLKUMARgupta20059: yes
rekhasushil78: then
ANMOLKUMARgupta20059: but why
Answered by vipinsingh16091998
1

Answer:

Step-by-step explanation:

3850

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