10. One side of a square garden is 85 decameter. What is the cost of fencing it at the rate of 25 paise per metre
(a) 160 m (b) 800 m²
(c) 100 m² (d) 250 m²
Answers
Answer:
Perimeter is the distance covered along the boundary forming a closed figure when you go round the figure once
Or
Perimeter is the sum of the sides of the polygon
(a)
Perimeter =
4
+
2
+
1
+
5
=
12
cm
(b)
Perimeter =
35
+
23
+
35
+
40
=
133
cm
(c)
Perimeter =
15
+
15
+
15
+
15
=
60
cm
(d)
Perimeter =
4
+
4
+
4
+
4
+
4
=
20
cm
(e)
Perimeter =
1
+
4
+
0.5
+
2.5
+
2.5
+
0.5
+
4
=
15
cm
(f)
Perimeter =
4
+
1
+
3
+
2
+
3
+
4
+
1
+
3
+
2
+
3
+
4
+
1
+
3
+
2
+
3
+
4
+
1
+
3
+
2
+
3
=
52
cm
• One side of square garden is 85 decameter.
• What's the cost of fencing at the rate of 25 paise?
Formula to be used :-
• Perimeter of square = 4a
Where,
a = Side
Given that,
One side square garden is 85 decameter.
Or, 850 m
★ Perimeter of square
= 4a
= 4 × 850m
= 3400m
Therefore,
★ Cost of fencing the square field at the rate of 25paise
= 3400 × 25
= 85000paise
= 850 Rupees
Hence, cost of fencing the field is Rs 850.
________________________________________________
For converting :-
• 1 rupee = 100paise
• 1 decameter = 10meters