Question

10 साल में, A 10 वर्ष पहले के मुकाबले दोगुना होगा। यदि A अब b से 9 वर्ष बड़ा है, तो b की वर्तमान आयु है

Answer 1

Answer:

A is presently 30 years old and B is 21 year old.

Step-by-step explanation:

Given :

After 10 years, A will turn twice the age of his 10 years back

A is elder than B by 9 years

To find :

B's present age

Solution :

Let the present ages be -

• B as y
• A as (y + 9)

Age 10 years ago -

• A = (y + 9) - 10

Ages after 10 years -

• A = (y + 9) + 10
• B = y + 10

$\rule{300}{1.5}$

According to the question,

A will be twice the age of he was 10 years back.

⇒ 2[(y + 9) - 10] = (y + 9) + 10

⇒ 2[y - 1] = y + 19

⇒ 2y - 2 = y + 19

⇒ 2y - y = 19 + 2

⇒ y = 21

B's present age = 21 years

$\rule{300}{1.5}$

A's present age -

⇒ 21 + 9

⇒ 30

∴ A is presently 30 years old and B is 21 year old.

Answer 2

$\mathfrak{\huge{\red{ANSWER}}}$

In Attatched File ......