The original price of a scarf was $16. During a store closing sale, a shopper saved $12 on the scarf. What percentage discount d
1 answer:
Answer:
The discount which she received is 25 %
Step-by-step explanation:
Given as :
The original price of scarf = $ 16
The selling price of scarf = $ 12
Let The discount percentage = d %
So,
Discount percentage = × 100
or, d % = × 100
Or, d % =
∴ d = 25%
Hence The discount which she received is 25 % Answer
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Answer:
Therefore the circumference of the circle is
Step-by-step explanation:
Let the side of the square be s
and the radius of the circle be r
The perimeter of the square is = 4s
The circumference of the circle is =2πr
Given that the length of the wire is 20 cm.
According to the problem,
4s + 2πr =20
⇒2s+πr =10
The area of the circle is = πr²
The area of the square is = s²
A represent the total area of the square and circle.
A=πr²+s²
Putting the value of s
For maximum or minimum
Differentiating with respect to r
Again differentiating with respect to r
> 0
For maximum or minimum
Therefore at , A is minimum.
Therefore the circumference of the circle is