Question

plz give me this sums ans 11 to14 i will rate you 5 ​

Answer 1

Answer:11th-15,20,25

12th-5,6,7

13th-Arjun-10years, Trupti-15years

14th- Total class strength =54

Step-by-step explanation:

11th-

Let the first number be x. The second multiple of 5 will be x+5 and the third will be x + 10.

These add to give

x+ x + 5 + x + 10 = 3x + 15

3x + 15 = 60

3x = 45

x = 15.

The second number will be 20 and the third 25 (15 + 20 + 25 = 60)

12th -

Let the three consecutive integers be

x, x+1 and x+2.

According to the question, 2x+3(x+1)+4(x+2)=56

2x+3x+3+4x+8=56

9x+11=5

9x=56-11

9x=45

x=5

Hence first integer = 5,

second integer=5 + 1 =6

and third integer = 5+ 2= 7

13th-

Given ratio-2:3

Let the multiple be x,

So, Arjun's present age =2x and

ten years later his age =2x+10

Trupti's age=3x and

ten years later her age=3x+10

Now,

According to question,

2x+10 + 3x+10=45

5x+20=45

5X=45-20

x=25/5=5

So Arjun's present age=5×2=10

And Trupti's present age=5×3=15

14th -

Given that,

Girls:Boys=5:4

Let the multiple be x,

Number of girls =5x,

Number of boys =4x

Because the number of girls is 6 more than the boys,

So,

5x=4x+6

5x-4x=6

X=6

Number of girls + number of boys = total class strength

5x+4x=total class strength

5×6+4×6=total class strength

30+24=total class strength

Total class strength =54