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 square of diagonal 8 cm is inscribed in a circle. Find the area of the region lying outside the circle and inside the square.
The length of the minute hand of a clock is 14 cm. Find the area swept by the minute hand in 5 minutes.
The ratio of the areas of a circle and an equilateral triangle whose diameter and a side are respectively equal, is
The area of a circle whose area and circumference are numerically equal, is
ABCD is a field in the shape of a trapezium, AD || BC, ∠ABC = 90° and ∠ADC = 60°. Four sectors are formed with centres A, B, C and D, as shown in the figure. The radius of each sector is 14 m. Find the following:
- total area of the four sectors,
- area of the remaining portion, given that AD = 55 m, BC = 45 m and AB = 30 m.
A chord of a circle of radius 10 cm subtends a right angle at the centre. The area of the minor segments (given, π = 3.14) is
Find the radius and area of a circle, whose circumference is :
(i) 132 cm
(ii) 22 m
The circumference of a circular table is 88 m. Find its area.
A circular field of radius 105 m has a circular path of uniform width of 5 m along and inside its boundary. Find the area of the path.
Find the area enclosed between two concentric circles, If their radii are 6cm and 13cm respectively.
