Question

solve the following pls tell the answer​

Answer 1

Step-by-step explanation:

1) let the age of arun be x

then, father's age will be 3x

x+3x=56

4x=56

x=56/4

x=14

arun =14 years

arun's father=42years

2) let the base angle be =x

then, each vertex angle will be 2x

sum of angles of a triangle is 180°

so,

x+2x+2x=180°

5x=180°

x=180°/5

x=34°

base angle = 34°

each vertex angle= 68°

3)Let the 1st no. will be x

then, 2nd no. will be x+1

and 3rd no. will be x+2

so,

x+x+1+x+2=21

3x+3=21

3x=21-3

3x=18

x=18/3

x=6

1st no.=6

2nd no.=7

3rd no.=8

4) let the breadth be x

then, length =2x

perimeter = 18cm

perimeter = 2(length + breadth)

so,

18cm=2(2x+x)

18cm=2(3x)

18cm=6x

18cm/6=x

3cm=x

breadth =3cm

length=6cm

hope it will be helpful