Answer:
there are 100 children in the class
It is given in the question that, The area of ava rectangular back yard is 325 square yards and the length of the yards is 13 yards.
Let the width be w yard .
And area of rectangle is the product of length and width .
So we have

Dividing both sides by w

So the width is 25 yards .
Surface area of cone is 60π cm^2
Option A is correct.
Step-by-step explanation:
We are given:
Height = 17cm
Radius= 3cm
We need to find surface area of cone in terms of π.
The formula used to find surface area of cone is:

Putting values:

So, Surface area of cone is 60π cm^2
Option A is correct.
Keywords: Surface area of cone
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