Aptitude   Area  Practice Q&A

1. A large field of 700 hectares is divided into two parts. The difference of the areas of the two parts is one-fifth of the average of the two areas. What is the area of the smaller part in hectares?

400 365 385 315

2. The diagonal of a rectangle is $ \sqrt{41} $ cm and its area is 20 sq. cm. The perimeter of the rectangle must be:

9 cm 18 cm 20 cm 41 cm

3. A rectangular plot measuring 90 metres by 50 metres needs to be enclosed by wire fencing such that poles of the fence will be kept 5 metres apart. How many poles will be needed?

30 44 56 60

4. 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:

Rs. 456 Rs. 458 Rs. 558 Rs. 568

5. If the length of a rectangle is halved and its breadth is tripled, what is the percentage change in its area?

25 % Increase 25 % Decrease 50 % Decrease 50 % Increase

6. A rectangular field has to be fenced on three sides leaving a side of 20 feet uncovered. If the area of the field is 680 sq. feet, how many feet of fencing will be required?

95 92 88 82

7. An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is:

2% 2.02% 4% 4.04%

8. The breadth of a rectangular field is 60% of its length. If the perimeter of the field is 800 m, find out the area of the field.

37500 m2 30500 m2 32500 m2 40000 m2

9. A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered. If the area of the field is 680 sq. feet, how many feet of fencing will be required?

34 40 68 88

10. If each side of a square is increased by 25%, find the percentage change in its area?

65.25 56.25 65 56

 

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