Advertisements
Advertisements
Question
If every side of a rectangle is doubled, then its area becomes _______ times
Options
2
3
4
6
Advertisements
Solution
4
Explanation;
Hint:
2l × 2b = 4l × b
APPEARS IN
RELATED QUESTIONS
Each side of a square plot of land is 55 m. Find the cost of fencing the plot at the rate of ₹32 per meter.
Find the perimeter of an equilateral triangle of side 9.8 cm.
If A denotes area of a rectangle, l represents its length and b represents its breadth, find:
b, if A = 88 m² and l = 8m
The cost of flooring a hall of ₹64 per square meter is ₹2,048. If the breadth of the hall is 5m, find:
(i) its length.
(ii) its perimeter.
(iii) cost of fixing a border of very small width along its boundary at the rate of ₹60 per square meter.
An athlete takes 10 rounds of a rectangular park, 50 m long and 25 m wide. Find the total distance covered by him.
The length of a rectangular plot of land is 50 m and its width is 30 m. A triple fence has to be put along its edges. If the wire costs 60 rupees per metre, what will be the total cost of the wire needed for the fence?
Length of a rectangular field is 250 m and width is 150 m. Anuradha runs around this field 3 times. How far did she run? How many times she should run around the field to cover a distance of 4 km?
The lid of a rectangular box of sides 40 cm by 10 cm is sealed all round with tape. What is the length of the tape required?
On a centimetre squared paper, make as many rectangles as you can, such that the area of the rectangle is 16 sq cm (consider only natural number lengths).
- Which rectangle has the greatest perimeter?
- Which rectangle has the least perimeter?
- If you take a rectangle of an area of 24 sq cm, what will be your answers?
In the following figure, perimeter of (ii) is greater than that of (i), but its area is smaller than that of (i).
![]() |
![]() |
| (i) | (ii) |


