Question

UND
Sol. Perimeter of the
eter of the rectangu - 2U D
130 - 2 (1 + 30)
1+30 = = 65
%. A door of length 2
Sol. Area of the d
1 = 65 - 30 = 35 cm
So the length of the rectangle is 35 cm
Area of the rectangle = 1xb
Now,
= 35 cm 30 cm = 1050 cm
ste. the area of the rectangle = 1050 cm
Hence,
of length 2 m and breadth 1 m is fitted in a wall. The length of the wall is 4.5 m and breadth
6 m. Find the cost of white washing the wall, if the rate of white washing the wall is * 20 per m.
of the door = Length Breadth - 2 m lm = 2 m
Length of the wall = 4.5 m
Breadth of the wall = 3.6 m
Area of the wall = 1 b
= 4.5 m > 3.6 m - 16.20 m
ea of the wall leaving the door = 16.20 m - 2 m = 14.20 m
Cost of white washing the wall at the rate of 20 per m
-? (14.20 x 20) = 7284
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Exercise 11.1
1. The cost of fencing a square garden is 7 400 at the rate of 1 per metre. Find tbe area of the garden in square metres.
2. If the side of a square be increased by 50%, find the per cent increase in area.
Find the number of marbles slabs of size 20 cm 30 cm required to pave the floor of a square room of side 3 m.
4. Find the number of squared tin sheets of side 30 cm, that can be cut off from a square tin sheet of side 1.5 m.
5. A coloured cloth 1.75 metre long and 105 cm wide is made into square handkerchiefs of side 35 cm. Find the
number of handkerchiefs made,
The length of a rectangle is increased by 25% while breadth is diminished by 30%. What is the impact on area?
7. Which rectangle has the greater arca: one which is 12 m by 9 m or one which is 10 m by 11 m?
8. The perimeter of a rectangle is 170 cm. If the length of the rectangle is 45 cm, find its breadth. Also find the
area of rectangle.
9. In exchange offer a square plot of land, one of whose sides is 84 m, a man wants to buy a rectangular plot of
length 144 m and of the same area as the square plot. Determine the width of the rectangular plot.
w. The length of a hall exceeds its breadth by 12 m. If the perimeter of the hall is 76 m, find the cost of carpeting
it at ? 4 per m.
X. If the side of a square is doubled, find the ratio of resulting square to that of the given square.
12. The sides of a rectangular plot are in the ratio 5:4 and is area is equal to 500 sq.m. Find the perimeter of the plot
AREA OF PARALLELOGRAMS AND TRIANGLES
Inherbergi
1. Parallelogram
() Perimeter of parallelogram = 2(sum of lengths of adjacent sides)
= 2(a + b) units
309
Peameter and Area​

Answer 1

Answer:

perimeter of the plot

AREA OF PARALLELOGRAMS AND TRIANGLES

Inherbergi

1. Parallelogram

() Perimeter of parallelogram = 2(sum of lengths of adjacent sides)

= 2

1

Step-by-step explanation:

perimeter of the plot

AREA OF PARALLELOGRAMS AND TRIANGLES

Inherbergi

1. Parallelogram

() Perimeter of parallelogram = 2(sum of lengths of adjacent sides)

= 2