# Area and perimeter Questions and answers

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11). The ratio of length of each equal side and the third side of an isosceles triangle is 3:4. If the area of the triangle is $$\Large \Large 18\sqrt{5}$$ sq units, the third side is
 A). $$\Large 8\sqrt{2}$$units B). 12 units C). 16 units D). $$\Large 5\sqrt{10}$$units
12). Three sides of a triangular field are of length 15 m, 20 m and 25 m long, respectively. Find the cost of sowing seeds in the field at the rate of RS. 5 per Sq m.
 A). 750 B). 150 C). 300 D). 600
13). A $$\Large \Large \triangle DEF$$ is formed by joining the mid points of the sides of $$\Large \Large \triangle ABC$$. Similarly, a $$\Large \Large \triangle PQR$$ is formed by joining the mid-points of the sides of the $$\Large \Large \triangle DEF$$. If the sides of the PQR are of lengths 1, 2 and 3 units, what is the perimeter of the $$\Large \Large \triangle ABC$$?
 A). 18 units B). 24 units C). 48 units D). Cannot be determined
14). Find the area of a rectangle having 15 m length and 8 m breadth.
 A). 120 sq m B). 111 sq m C). 115 sq m D). 125 sq m
15). The length of a rectangular field is 100 m and its breadth is 40 m. What will be the area of the field?
 A). $$\Large (4\times 10^{2})$$sq m B). $$\Large (4\times 10)$$sq m C). $$\Large (4\times 10^{4})$$sq m D). $$\Large (4\times 10^{3})$$sq m

16). The area of a rectangular playground is 300 sq m. If the breadth of the field is 15 m, find the length of the field.
 A). 20 m B). 11 m C). 25 m D). 10 m
17). The ratio of length and breadth of a rectangle is 5 : 3. If length is 8 m more than breadth, find the area of the rectangle.
 A). 300 sq m B). 250 sq m C). 240 sq m D). 185 sq m
18). The perimeter of a rectangle having area equal to $$\Large \Large 144 cm^{2}$$ and sides in the ratio 4 : 9 is
 A). 52 cm B). 56 cm C). 60 cm D). 64 cm
19). The area of a rectangle lies between $$\Large \Large 40 cm^{2}$$ and $$\Large \Large 45 cm^{2}$$. If one of the sides is 5 cm, then its diagonal lies between
 A). 8 cm and 10 cm B). 9 cm and 11 cm C). 10 cm and 12 cm D). 11cm and 13 cm
20). The area of a rectangular field is 15 times the sum of its length and breadth. If the length of that field is 40 m, what is the breadth of that field?
 A). 24 m B). 25 m C). 28 m D). 32 m
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