Advertisements
Advertisements
प्रश्न
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
उत्तर
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
संबंधित प्रश्न
A circular flower bed is surrounded by a path 4 m wide. The diameter of the flower bed is 66 m. What is the area of this path? (π = 3.14)
The cost of harvesting a square field at ₹ 900 per hectare is ₹ 8100. Find the cost of putting a fence around it at ₹ 18 per meter.
In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find the area of the sector formed by the arc. (Use π = `22/7`)
In the following figure a square OABC is inscribed in a quadrant OPBQ of a circle. If OA = 21 cm, find the area of the shaded region.
If he area of a sector of a circle is \[\frac{7}{20}\] of the area of the circle, then the sector angle is equal to
If the area of a circle is equal to the sum of the areas of two circles of diameters 10 cm and 24 cm, then diameter of the large circle (in cm) is
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?
If a square in inscribed in a circle, find the ratio of the areas of the circle and the square.
Find the area of the shaded portion in each of the following diagrams:
(i)
(ii)
The area of the circle is 154 cm2. The radius of the circle is ______.
