Advertisements
Advertisements
प्रश्न
Find the perimeter of a rectangle with length = 24 cm and diagonal = 25 cm
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
The cost of fencing a square field at the rate of ₹ 75 per meter is ₹ 67,500. Find the perimeter and the side of the square field.
Write the perimeter of the figure in the box given below it.
The area of a rectangular shaped photo is 820 sq.cm. and its width is 20 cm. What is its length? Also find its perimeter
What is the perimeter of the rectangle? ________ cm
Take a thick paper sheet of length 14 cm and width 9 cm. You can also use an old postcard.
- What is its area? What is its perimeter?
The side of a square is 10 cm. How many times will the new perimeter become if the side of the square is doubled?
Perimeter of a regular octagon of side 6 cm is 36 cm.
Perimeter of an isosceles triangle is 50 cm. If one of the two equal sides is 18 cm, find the third side.
A table-top measures 2 m 25 cm by 1 m 50 cm. What is the perimeter of the table-top?
