Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
Length of outer boundary = Perimeter of park = Sum of all sides length
= (200 + 300 + 80 + 300 + 200 + 260) m
= 1340 m
Also, rate of fencing per metre = Rs. 20
Then, rate of fencing 1340 metre = 20 × 1340 = Rs. 26800
Now, length of rectangular flower bed = 100 m and breadth of rectangular flower bed = 80 m
∴ Area of rectangular flower bed = Length × Breadth
= 100 × 80
= 8000 sq.m
Also, rate of manuring the flower bed per square metre = Rs. 50
Then, rate of manuring the flower bed of area 8000 sq.m = 50 × 8000 = Rs. 400000
APPEARS IN
संबंधित प्रश्न
The length and the breadth of a rectangle are 36 cm and 28 cm. If its perimeter is equal to the perimeter of a square, find the side of the square.
Find the perimeter of each of the following closed figures:
The sides of a rectangle are 5 cm and 3 cm respectively. Find its area in mm2.
Write the perimeter of the figure in the box given below it.
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?
Match the following:
| Shapes | Perimeter |
(A)  |
(i) 10 |
(B)  |
(ii) 18 |
(C)  |
(iii) 20 |
(D)  |
(iv) 25 |
A farmer who wants to fence his field, must find the perimeter of the field.
Four regular hexagons are drawn so as to form the design as shown in the following figure. If the perimeter of the design is 28 cm, find the length of each side of the hexagon.
Length of a rectangular field is 6 times its breadth. If the length of the field is 120 cm, find the breadth and perimeter of the field.
A closed figure has 12 sides, each measuring 3 cm, except four sides which measure 1 cm each. What is its perimeter?
