Advertisements
Advertisements
प्रश्न
The area of a floor of a rectangular room is 360m2. If its length is 24cm, find its perimeter.
उत्तर
The area of a rectangle with length l and breadth b = A = l x b
Let the breadth of the rectangle = bcm
∴ For a rectangle with length 24cm and breadth bcm, A = 24 x b
⇒ 360 = 24b
⇒ b = `(360)/(24)`
= 15cm
The perimeter of a rectangle with length l and breadth b = P = 2(l + b)
∴ For a rectangle with length 24cm and breadth 15cm, P = 2(24 + 15) = 78cm.
APPEARS IN
संबंधित प्रश्न
ABCD is a rectangle in which diagonal AC bisects ∠A as well as ∠C. Show that:
- ABCD is a square
- diagonal BD bisects ∠B as well as ∠D.
ABCD is a rectangle with ∠ABD = 40°. Determine ∠DBC .
State, 'true' or 'false'
Every rhombus is a parallelogram.
State, 'true' or 'false'
Every parallelogram is a rhombus.
In the following figures, ABCD is a parallelogram.
find the values of x and y.
In the figure, ABCD is a parallelogram and APD is an equilateral triangle of side 80cm, Calculate the area of parallelogram ABCD.
In the given figure, if AB ∥ DC ∥ FG and AE is a straight line. Also, AD ∥ FC. Prove that: area of ∥ gm ABCD = area of ∥ gm BFGE.
If the medians of a ΔABBC intersect at G, show that ar(ΔAGB) = ar(ΔAGC) = ar(ΔBGC) = `(1)/(3)"ar(ΔABC)"`.
Find the area of each of the following figure:
Find the height of a parallelogram whose area is 144cm2 and the base is 18cm.
In a rectangle ABCD, AB = 7 cm and AD = 25 cm. Find the height of a triangle whose base is AB and whose area is two times the area of the rectangle ABCD.
A rectangular floor 45 in long and 12 m broad is to be paved exactly with square tiles, of side 60 cm. Find the total number of tiles required to pave it.
If a carpet is laid on the floor such as a space of 50 cm exists between its edges and the edges of the floor, find what fraction of the floor is uncovered.
The area of a square garden is equal to the area of a rectangular plot of length 160m and width 40m. Calculate the cost of fencing the square garden at Rs.12per m.
The area of a square plot of side 80m is equal to the area of a rectangular plot of length 160m. Calculate the width of the rectangular plot and the cost of fencing it Rs.7.50per m.
Find the area of a rhombus whose perimeter is 260cm and the length of one of its diagonal is 66cm.
The diagonals of a square are perpendicular to one another.
All the sides of a rhombus are of equal length.
Give reason for the following :
A square can be thought of as a special rectangle.
A figure is said to be regular if its sides are equal in length and angles are equal in measure. Can you identify the regular quadrilateral?
Examine whether the following is a polygon. If it is not, say why?
