Advertisements
Advertisements
प्रश्न
Find the perimeter of a rectangle with length = 24 cm and diagonal = 25 cm
Advertisements
उत्तर
Length of a rectangle (l) = 24 cm, Diagonal = 25 cm
Let breadth of the rectangle = b m
Applying Pythagoras Theorem in triangle ABC,
We get, (AC)2 = (AB)2 + (BC)2
(25)2 = (24)2 + (b)2
625 = 576 + (b)2
625 – 576 = b2
49 = b2
`sqrt(7xx7)` = b
∴ b = 7 cm
Now, perimeter of the rectangle
= 2(1 + b)
= 2(24 + 7)
= 2(31)
= 62 cm
APPEARS IN
संबंधित प्रश्न
If P = perimeter of a rectangle, l= its length and b = its breadth find P, if l = 38 cm and b = 27 cm
If P = perimeter of a rectangle, l = its length and b = its breadth; find l, if P = 96 m and b = 28 m.
The perimeters of two squares are in the ratio 8 : 15, find the ratio between the lengths of their sides.
What do you understand by a plane closed figure?
Chumki, Jhumri, and Imran need wire to make a fence.
- Who will need the longest wire for fencing?
Can you make a rectangle with a still longer boundary? I made a rectangle 1 cm wide and 80000 m long. Imagine how long that boundary will be!!! With that much gold wire I can become a king!
The side of a square is 10 cm. How many times will the new perimeter become if the side of the square is doubled?
A rectangle and a square have the same perimeter (Figure).
- The area of the rectangle is ______.
- The area of the square is ______.
What is the length of outer boundary of the park shown in the following figure? What will be the total cost of fencing it at the rate of Rs 20 per metre? There is a rectangular flower bed in the center of the park. Find the cost of manuring the flower bed at the rate of Rs 50 per square metre.
Find the perimeter of the following shape:
An isosceles triangle with equal sides of 8 cm each and the third side of 6 cm.
