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 (Figure). Which pizza is a better deal?
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 = `22/1 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 path of width 3.5 m runs around a semi-circular grassy plot whose perimeter is 72 m . Find the area of the path .
`("Use" pi= 22/7) `
In the following figure, PQRS is a square of side 4 cm. Find the area of the shaded square.
What is the ratio of the areas of a circle and an equilateral triangle whose diameter and a side are respectively equal?
How many revolutions a circular wheel of radius r metres makes in covering a distance of s metres?
A wire can be bent in the form of a circle of radius 56 cm. If it is bent in the form fo a square, then its area will be
The short and long hands of a clock are 4 cm and 6 cm long respectively. Find the sum of distances travelled by their tips in 2 days.
The diameter of the wheels of a bus is 140 cm. How many revolutions per minute do the wheels make when the bus is moving at a speed of 72.6 km per hour?
The circumference of a circular table is 88 m. Find its area.
The diameters of three wheels are in the ratio 2 : 4 : 8. If the sum of the circumferences of these circles be 132 cm, find the difference between the areas of the largest and the smallest of these wheels.
Find the area of the dining table whose diameter is 105 cm
