Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
The area of a rectangle with length l and breadth b = A = l x b
The area of a rectangle with length 44cm and breadth 28cm
= A
= 44 x 28
= 1232cm2
The largest circle that can be cut from a rectangle of length 44cm and breadth 28cm can have diameter 28cm or radius `(28)/(2)` = 14cm
The Area of a Circle with radius r = πr2
The Area of a Circle with radius 14
= π(14)2
= 616cm2
Remaining area
= 1232cm2 - 616cm2
= 616cm2.
APPEARS IN
संबंधित प्रश्न
A rectangular plot measure 125 m by 78 m. It has gravel path 3 m wide all around on the outside. Find the area of the path and the cost of gravelling it at` ₹ 75 per m^2`
In the following figure, PQRS is a square of side 4 cm. Find the area of the shaded square.
In the following figure, OACB is a quadrant of a circle with centre O and radius 3.5 cm. If OD = 2 cm, find the area of the (i) quadrant OACB (ii) shaded region.
In the given figure, ABCD is a trapezium with AB || DC, AB = 18 cm DC = 32 cm and the distance between AB and DC is 14 cm. Circles of equal radii 7 cm with centres A, B, C and D have been drawn. Then find the area of the shaded region.
(Use \[\pi = \frac{22}{7}\]
The area of a sector whose perimeter is four times its radius r units, is
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
If π is taken as `22/7` the distance (in metres) covered by a wheel of diameter 35 cm, in one revolution, is
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 radii of the inner and outer circumferences of a circular running track are 63 m and 70 m respectively. Find :
(i) the area of the track ;
(ii) the difference between the lengths of the two circumferences of the track.
If the radius of a semi-circular protractor is 7cm, then its perimeter is ______.
