Question

Exercise 13.2
Area in cm)
1. Full in the blanks for a rectangle.
Length in cm)
Breadth (in cm)
7
6
7
2. Fill in the blanks for a square.
Side (in cm)
Five squa
Find the
14. Caleulat
Perimeter (in cm)
Area in em')
()
20
3. If the area of a rectangular plot is 2,400 sq m, then find:
its breadth if length is 80 m
(1) its length if breadth is 40 m
4. Find the perimeter of a rectangle if its area is 195 em' and breadth is 12 cm.
Find the perimeter of a rectangular field whose length is 22 m and area is 176 sq m.
6. A room has a floor area of 15 m by 10 m. A square carpet of side 7 m is laid on the floor.
How much of the floor area is not carpeted?
7 Use tracing paper and centimetre graph paper to compare the areas of following pairs of
figures.
Fig. 13.22
8. The area of a rectangular piece of cardboard is 36 sq cm and its length is 9 cm. What 4s the
width of the cardboard?
9. Inside a square garden of side 160 m, a road, 3 metre wide is built all around. What is the
area of the remaining part of the garden?
(Hint: Find the length of the Inner square
19. A room is 18 m long and 12 m broad. Find the cost of carpeting the room at the rate of
9.50 per square metre.​

Answer 1

Answer number 3. it's breadth is 30 m if it's length is 80 m

AND it's length is 60 m if it's breadth is 40 m.

Step-by-step explanation:

FOR FINDING THE BREADTH :-

area of a rectangle is Length * breadth

area = Length * Breadth

2400 = 80 * Breadth

Breadth = 2400/80

therefore, Breadth = 30 m (answer)

FOR FINDING THE LENGTH :-

area of a rectangle is Length * breadth

area = Length * Breadth

2400 = 80 * Breadth

Breadth = 2400/40

therefore, Breadth = 60 m (answer)

Answer 2

Answer:

Step-by-step explanation:

Sorry I don't know