Question

12) The perimeter of a rectangle is 42 cm and its length is double its breadth. Find the length

(b) The lid of a square box UI
the tape required.
and breadth of the rectangle.
The shortest side of a triangular garden is 20 m. Its perimeter is 130 m and its longest side
is 3 times its shortest side. Find the third side of the garden.
14. The perimeter of an equilateral triangle is 42 cm. Find the periyneter of a square, each nie
of which is double the side of the triangle.
15. A rectangular playground is 42 m long and 38 m broad. If a girl runs round the playgroun
twice then find the distance covered by her.
163 A field is in the shape of a square of side 150 m. The cost of fencing the field is 745
metre. Find the total cost of fencing the field.
17. A rectangular piece of land measures 0.8 km by 0.6 km Each side is to be fenced w
three rows of wire. Find the length of the wire needed. f the cost of fencing is 50
metre, find the total cost of fencing the land.
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Answer 1

Answer:

a. perimeter of rectangle = 2×(l+b)