** 17) The breadth of a rectangular field is two-third of its length. If the perimeter of the field is 200 feet, the length of the field in feet is **

(A) 40

(B) 26

(C) 60

(D) 120

(E) None of these

** 18) A wire in the form of a circle of radius 42 cm is cut and bent in the form of a square. The side of the square thus formed is**

(A) 21 cm

(B) 66 cm

(C) 33 cm

(D) 132 cm

** 19) A rope to which a calf is tied is increased in length from 12 metres to 23 metres. The area of additional ground which it can graze will be**

(A) 1210 sq. metres

(B) 120 sq. metres

(C) 1220 sq. metres

(D) 121 sq. metres

** 20) The difference between the circumference and diameter of a circle is 210 cm. The radius of the circle is**

(A) 7 cm

(B) 49 cm

(C) 25 cm

(D) 40 cm

** 21) A square playground has an area of 400 m ^{2}. Flag staffs are to be erected along the perimeter at a distance of 4 m from each other. The total number of flag staffs required is**

(A) 100

(B) 20

(C) 25

(D) 10

** 22) The perimeter of a rectangular field is 280 m and its breadth is 60 m. The length of its diagonal is closest to**

(A) 96 m

(B) 98.8 m

(C) 100 m

(D) 103.75 m

** 23) A room 5m * 8m is to be carpeted leaving a margin of 10 cm from each wall. If the cost of the carpet is Rs. 18 per m ^{2}, the cost of carpeting the room will be**

(A) 702.60

(B) 691.80

(C) 682.46

(D) 673.92

** 24) The lengths of two parallel sides of a trapezium are 14 cm and 32 cm and the perpendicular distance between them is 8 cm. The area of the trapezium is**

(A) 184 sq. cm

(B) 368 sq. cm

(C) 82 sq. cm

(D) 148 sq. cm