during environment day celebration in school 5 groups 1,2,3,4 and 5 of students of class 9 where made to plant trees in circular plot in corner of the school as below.Also,radius of small circle and large circle are 105 cm and 220 cm respectively.What is the total area developed by all five groups together?
Answers
Answer:
the total area developed by all five groups together is 23466.88 sq cm.
Step-by-step explanation:
To find the total area developed by all five groups together, we need to first calculate the area of the circular plot where the trees are planted. We can do this by using the formula for the area of a circle, which is A = πr^2, where A is the area and r is the radius.
The radius of the large circle is given as 220 cm, so its area is A = π(220)^2 = 48400π sq cm. Similarly, the area of the small circle is A = π(105)^2 = 11025π sq cm.
To find the area of the portion between the two circles where the trees are planted, we need to subtract the area of the smaller circle from the area of the larger circle. This gives us 48400π - 11025π = 37375π sq cm.
Now, we need to divide this area among the five groups. Since there are no specific instructions given about the distribution of the area among the groups, we can assume that each group gets an equal share.
Therefore, the total area developed by all five groups together is (37375π / 5) = 7475π sq cm, which is approximately equal to 23466.88 sq cm (taking π = 3.14).
So, the total area developed by all five groups together is 23466.88 sq cm.
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