Question

find the area of a plot whose circumference in 330 meter

Answer 1

Step-by-step explanation:

Answer

Given: A path of 4 m width runs round a semi-circular grassy plot whose circumference is 163 3 7 m

(i) To find the area of the path.

Here, AB = 4 m and circumference of semicircle with radius OA is.

The circumference of the smaller semicircle is given by,

Now we will substitute.

Now we will find OB.

Thus, the area between two semi-circles is,

Therefore, area of the path is.

(ii) To find the cost of gravelling the path at the rate of Rs 1.50 per square metre.

Therefore, cost of gravelling the path is.

(iii) To find the cost of turfing the plot at the rate of 45 paise per m 2 .

Thus, the area of the plot is,

Therefore, cost of the turfing the plot is