Question 1. Asked on :05 February 2019:05:11:52 PM
-Added by Himanshi Verma Mathematics » Perimeter And Area
Answer:
Given
Ratio of side =3:2
Perimeter =60cm
Altitude =5cm
So let take one side as 3x and other is 2x
Then perimeter of parallelogram
=3x+2x+3x+2x
=10x
According to question perimeter =60cm
Then
10x=60cm
X=60/10=6cm
Then one side is =6 x 3=18
And other is =2x6=12
So base=18cm
Area of parallelogram =bxh
=18x5=90cm²
Altitude corresponding to smaller side
90=12xh
H=7.5cm
-Answered by Himanshi Verma On 05 February 2019:05:26:39 PM
Question 2. Asked on :28 January 2019:10:53:52 AM
A garden is 90 m long and 75 m broad. A path 5 m wide is to be built outside and around it. find the area of the garden in hectare.
-Added by praful kumar Mathematics » Perimeter And Area
Answer:
Length (l) of garden = 90 m
Breadth (b) of garden = 75 m
Area of garden = l × b = 90 × 75 = 6750 m2
From the figure, it can be observed that the new length and breadth of the garden, when path is also included, are 100m and 85m respectively.
Area of the garden including the path = 100 × 85 = 8500 m2
Area of path = Area of the garden including the path − Area of garden
= 8500 − 6750 = 1750 m2
1 hectare = 10000 m2
Therefore, area of garden in hectare
=6750/10000
=0.675
-Answered by Himanshi Verma On 02 February 2019:01:49:33 PM
Question 3. Asked on :28 January 2019:10:49:14 AM
Find the area of a square park whose perimeter is 320m.
-Added by praful kumar Mathematics » Perimeter And Area
Answer:
A=6400m2
-Answered by Himanshi Verma On 03 February 2019:04:19:42 PM
Question 4. Asked on :17 January 2019:08:47:48 AM
path 1m wide built along the border and inside a square garden of side 30m. find ;
[i] The area of the path.
[ii] the cost of planting grass in the remaining portion of the garden at the rate of Rs.40 per m2
-Added by Nitish kumar Mathematics » Perimeter And Area
Answer:
Let ABCD, the square garden of side= 30 m.
PQRS is the region inside the garden.
so,
PQ = (30 -1-1 ) = 28 m
also
PS = ( 30 – 1 – 1 ) = 28 m
(i) Area of the path = Area of ABCD – Area of PQRS
= [( 30 x 30) – (28 x 28)]
= 900 – 784
= 116 sq.m
(ii) Area of the remaining portion in which the grass is planted = Area of square PQRS
= 28 x 28
= 784 sq.m
cost of planting the grass in the region PQRS = area x cost = 764 x 40
=31,360
-Answered by Himanshi Verma On 18 January 2019:05:16:10 PM
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