Question

Solution
Length of each side of the given herus
perimeter of the hexagon = (6 x 6.5) cm = 39 cm.
EXERCISE 21A
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1. Find the perimeter of a rectangle in which:
(i) length
16.8 cm and breadth = 6.2 cm
(ii) length = 2 m 25 cm and breadth = l m 50 cm
(iii) length = 8 m 5 dm and breadth 6 m 8 dm
3. The length and the breadth of a rectangular field are in the ratio 5:3. If its perimeter is
rectangular field 62 m long and 33 m wide at * 16 per metre.
4. The cost of fencing a rectangular field at 18 per metre is 1980. If the width of the field is
5. The length and the breadth of a rectangular field are in the ratio 7:4. The cost of fencing the
field at 25 per metre is 73300. Find the dimensions of the field.
6. Find the perimeter of a square, each of whose sides measures:
(ii) 4.6 m
(iii) 2 m 5 dm
(i) 3.8 cm
7. The cost of putting a fence around a square field at 35 per metre is 4480. Find the length
of each side of the field.
B. Each side of a square field measures 21 m. Adjacent to this field, there is a rectangular field
having its sides in the ratio 4 : 3. If the perimeters of both the fields are equal, find the
dimensions of the rectangular field.
Find the​

Answer 1

Answer:

1.i) perimeter=2(l+b)

=2(16.8+6.2)

=2*23

=46cm

ii) perimeter=2(l+b)

2(2.25+1.50)

2*3.75

7m50cm