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 m2. 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 m2, 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