Find the perimeter and area of the given
figure. (1 = 3.14)
5 cm -
8 cm
11
G
4 cm
- 10cm
Answers
Answer:
The length and breadth of a rectangular piece of land are 500 m and 300 m respectively.
Find:
(i) Its area. (ii) The cost of the land, if 1 m2 of the land costs Rs 10,000.
Answer:
Given: Length of a rectangular piece of land = 500 m
and breadth of a rectangular piece of land = 300 m
(i) Area of a rectangular piece of land = Length * Breadth
= 500 * 300
= 1,50,000 m2
(ii) Since, the cost of 1 m2 land = Rs 10,000
Therefore, the cost of 1,50,000 m2 land = 10,000 * 1,50,000 = Rs 1,50,00,00,000
Question 2:
Find the area of a square park whose perimeter is 320 m.
Answer:
Given: Perimeter of square park = 320 m
=> 4 * side = 320
=> side = 320/4 = 80 m
Now, Area of square park = side * side = 80 * 80 = 6400 m2
Thus, the area of the square park is 6400 m2.
Question 3:
Find the breadth of a rectangular plot of land, if its area is 440 m2 and the length is 22 m. Also find its perimeter.
Answer:
Area of rectangular park = 440 m2
=> length * breadth = 440 m2
=> 22 * breadth = 440
=> breadth = 440/22 = 20 m
Now, Perimeter of rectangular park = 2(length + breadth)
= 2(22 + 20)
= 2 * 42 = 84 m
Thus, the perimeter of rectangular park is 84 m.
Question 4:
The perimeter of a rectangular sheet is 100 cm. If the length is 35 cm, find its breadth. Also find the area.
Answer:
Perimeter of the rectangular sheet = 100 cm
=> 2(length + breadth) = 100 cm
=> 2(35 + breadth) = 100
=> 35 + breadth = 100/2
=> 35 + breadth = 50
=> breadth = 50 - 35
=> breadth = 15 cm
Now, Area of rectangular sheet = length * breadth
= 35 * 15 = 525 cm2
Thus, breadth and area of rectangular sheet are 15 cm and 525 cm2 respectively.
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