Advertisements
Advertisements
Question
Pizza factory has come out with two kinds of pizzas. A square pizza of side 45 cm costs ₹ 150 and a circular pizza of diameter 50 cm costs ₹ 160 (see figure). Which pizza is a better deal?
Advertisements
Solution
Given, side of square pizza = 45 cm
∴ Area of a square pizza = (Side)2 = (45)2 = 2025 cm2
Diameter of circular pizza = 50 cm
∴ Radius = `50/2` = 25 cm ...`[∵ "Radius" = "Diameter"/2]`
Now, area of the circular pizza = `22/7 xx 25 xx 25`
= `22/7 xx 625`
= `13750/7`
= 1964.28 cm2 ...[∵ Area of circle = πr2]
∴ Price of 1 cm square pizza = `2025/150` = ₹ 13.5
And price of 1 cm circular pizza = `1964.28/160` = ₹ 12.27
Hence, the circular pizza is a better deal.
APPEARS IN
RELATED QUESTIONS
A room is 16 m long and 13.5 m broad. Find the cost of covering its floor with 75-cm-wide carpet at ₹ 60 per metre.
An archery target has three regions formed by three concentric circles as shown in figure. If the diameters of the concentric circles are in the ratios 1 : 2 : 3, then find the ratio of the areas of three regions.
In the given figure, the side of square is 28 cm and radius of each circle is half of the length of the side of the square, where O and O' are centres of the circles. Find the area of shaded region.
Write the area of the sector of a circle whose radius is r and length of the arc is l.
If the circumference and the area of a circle are numerically equal, then diameter of the circle is
In the following figure, the area of the segment PAQ is
A wire is bent to form a square enclosing an area of 484 cm2. Using the same wire, a circle is formed. Find the area of the circle.
Find the area of the biggest circle that can be cut from a rectangular piece 44cm by 28cm. also, find the area of the paper left after cutting out the circle.
Calculate the area of the shotput circle whose radius is 2.135 m.
Find the area of the shaded region:
