Q21. The length of a rectangular hall is 5m more than its breadth. The area of the hall is 750 sq.m.. The length of the hall is :
A. 15 m
B. 25 m
C. 30 m
D. 22.5 m
Q22. The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:
A. 40%
B. 42%
C. 44%
D. 46%
Q23. A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is:
A. Rs. 458
B. Rs. 568
C. Rs. 558
D. Rs. 456
Q24. The length of the room is 5.5m and width is 3.75m. Find the cost of paving the floor by slabs at the rate of Rs.800 per sq meter:
A. 15500
B. 16500
C. 17500
D. 18500
Q25. The sides of a rectangular field are in the ratio 3 : 4. If the area of the field is 7500 sq. m, the cost of fencing the field @ 25 paise per metre is :
A. Rs. 87.50
B. Rs. 86.50
C. Rs. 55.50
D. Rs. 67.50
Q26. A typist uses a sheet measuring 20cm by 30cm lengthwise.If a margin of 2 cm is left on each side and a 3 cm margin on top and bottom, then percent of the page used for typing is:
A. 60%
B. 40%
C. 64%
D. 72%
Q27. The perimeters of five squares are 24 cm, 32 cm, 40 cm, 76 cm and 80 cm respectively. The perimeter of another square equal in area to the sum of the areas of these squares is :
A. 31 cm
B. 62 cm
C. 961 cm
D. 124 cm
Q28. A rectangular plot measuring 90 meters by 50 meters is to be enclosed by wire fencing. If the poles of the fence are kept 5 meters apart. How many poles will be needed?
A. 45m
B. 56m
C. 65m
D. 55m
Q29. A wheel makes 1000 revolutions in covering a distance of 88 km. Find the radius of the wheel.
A. 13
B. 11
C. 12
D. 14
Q30. The difference between two parallel sides of a trapezium is 4 cm. perpendicular distance between them is 19 cm. If the area of the trapezium is 475 find the lengths of the parallel sides.
A. 25 and 23
B. 24 and 23
C. 27 and 23
D. 22 and 23
