Question

Find the perimeter of each of the following figures.
(a)
(b)
7 cm
(C)
6 cm
7 cm
4 cm
4cm
2 cm
2 cm
5 cm
bo
4 cm
2 cm
5 cm
5 cm
3 cm
4 cm
4 cm
3 cm
8 cm
1 cm
(d)
(e)
3 cm
3 cm
18 m
5 cm
5 cm
6 cm
10 m
12 cm
12 cm
12 m
6 cm
8 m
17 m
5 cm
5 cm
13 m
3 cm
3 cm
4 m
2 Find the perimeter of the triangle whose sides are:
4 m​

Answer 1

Answer:

Three cuboid of dimension 5cm×6cm×7cm

4cm×7cm×8cm & 2cm×3cm×13cm

are melted & converted into cube.

Cuboid 1=5cm×6cm×7cm …………(1)

Cuboid 2=4cm×7cm×8cm ………….(2)

Cuboid 3=2cm×3cm×13cm ……………(3)

Now volume of cuboid (1+2+3)= volume of cube (2)

Let 'a' be the edge of cube formed then

Volume of cuboid 1=lbh=210cm3

Volume of cuboid 2=lbh=224cm3

Volume of cuboid 3=lbh=78cm3

From equation (4) we get

a3=210+224+78

a3=512

a3=(8)3

[a=8]

Hence edge of cube is 8cm.

carry on