Question

the difference between ages of ravi and geeta is 10 years. if 5 years earlier ravi was twice as old as geeta, find there present age​

Answer 1

Explanation:

Given :-

Difference between ages of ravi and Geeta is 10 years

5 years earlier ravi was twice as old as geeta

Solution :-

Let the present age of Ravi be x and Geeta's age will be (x - 10) years.

Now

After 5 years

age of Ravi's = (x - 5) years

age of Geeta's age = 2(x - 10 - 5) years

(x - 5) = 2(x - 10 - 5)

x- 5 = 2x - 20 - 10

2x - x = 20 + 10 - 5

x = 20 + 5

x = 25

Here you go⚡

Answer 2

Answer:

the ratio of boys to the girls is 5 is to 3 if the number of girls is 300 what is the number of boys

Answer:

3/5of300=3×60=180 equal to nu. of girls

So,boys =total students - nu. of girls

=300–180 = 120

Alternative method ,

Let total students be 1

Nu. of girls =3/4(given)

So ,nu. of boys= 1(total students)–3/5(nu. of girls)=1–3/5=2/5

Then,nu.of boys=2/5 of total students

=2/5×300 = 120