Question

The present age of Sahil’s mother is three times the present age of Sahil. After    5 years their ages will add to 66 years. Find their present ages.

   8. Solve: x= 45 (x+ 10)

   9. Solve: 23 + 1 = 715 + 3

10. Perimeter of equilateral triangle is 360cm.find the side of the triangle:

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Answer 1

Answer:

7.let sahils mother's age be x years and sahils be y years.

A.T.P

x=3y

After 5 years, x+5+y+5=66

x+y+10=66

put x=3y in above equation

3y+y+10=66

4y+10=66

4y=66-10=56

•°•y=56/4=14

x=3y=3 (14)=42

•°•Sahil's mother's age is 42 years and sahil's age is 14 years

8.x=45 (x+10)

x=45x+450

x-45x=450

-44x=450

x=450/-44

9.23+1=715+3

24=718

718-24=0

694

10. Let the sides be a

perimeter =360cm

•°•perimeter=3a

360=3a

a=360/3

a=120

sides of the equilateral triangle is 120cm

Answer 2

Answer:1:14

2:450/-44 or 10.23

3:694

4:120cm

Step-by-step explanation:X=3y

(X+5)+(y+5)=66

3y+y+10=66

4y=56

Y=14

X=3y

X=42

2:x=45x+450

-44x=450

X=450/-44 or -10.23

3: 24=718

=718-24

=694

4: p=360

S=360/3

S=120