Advertisements
Advertisements
Question
The side of a square field is 16 m. What will be increase in its area, if each of its sides is doubled?
Advertisements
Solution
Side of a square field (a) = 16 m
∴ Area of a square field = (a)2
= 16 × 16 m2 = 256 m2
Each of its side is doubled
∴ New side = (16 × 2)m = 32 m
∴ New area of the square field = (a)2
= 32 × 32 m2 = 1024 m2
APPEARS IN
RELATED QUESTIONS
In Q. No 1, if AD = 6 cm, CF = 10 cm, and AE = 8cm, find AB.
In the below fig. ABCD is a trapezium in which AB = 7 cm, AD = BC = 5 cm, DC = x cm,
and distance between AB and DC is 4cm. Find the value of x and area of trapezium ABCD.
If ABC and BDE are two equilateral triangles such that D is the mid-point of BC, then find ar (ΔABC) : ar (ΔBDE).
In the given figure, ABCD is a rectangle with sides AB = 10 cm and AD = 5 cm. Find the area of ΔEFG.
Let ABC be a triangle of area 24 sq. units and PQR be the triangle formed by the mid-points of the sides of Δ ABC. Then the area of ΔPQR is
The sides of a rectangular park are in the ratio 4 : 3. If its area is 1728 m2, find
(i) its perimeter
(ii) cost of fencing it at the rate of ₹40 per meter.
Look at the table. If you were to write the area of each of these which column would you choose? Make a (✓).
| Square cm |
Square meter |
Square km |
|
| Handkerchief | ✓ | ||
| Sari | |||
| Page of your book | |||
| School land | |||
| Total land of a city | |||
| Door of your classroom | |||
| Chair seat | |||
| Blackboard | |||
| Indian flag | |||
| Land over which a river flows |
Find all the possible dimensions (in natural numbers) of a rectangle with a perimeter 36 cm and find their areas.
Find the area of the following figure by counting squares:
Find the area of the following figure by counting squares:
