The difference between the length and breadth of a rectangle is 23 m. If its perimeter is 206 m, then its area is:
We have: (l - b) = 23 and 2(l + b) = 206 or (l + b) = 103.
Solving the two equations, we get: l = 63 and b = 40.
$\therefore Area = (l \times b) = (63 \times 40)$ m2 = 2520 m2.
|
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? |
Answer |
|
The diagonal of a rectangle is $ \sqrt{41} $ cm and its area is 20 sq. cm. The perimeter of the rectangle must be: |
Answer |
|
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? |
Answer |
|
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: |
Answer |
|
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? |
Answer |
|
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: |
Answer |
|
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. |
Answer |
|
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? |
Answer |
|
If each side of a square is increased by 25%, find the percentage change in its area? |
Answer |
|
Find the area of a square of side 35 m. |
Answer |