Question

Nisha is 15 years elder to Romi. If 5 years ago, Nisha was 3 times as old as Romi, then find Nisha’s present age. ?
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Answer 1

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Step-by-step explanation:

Let age of Romi be y

Nisha is 15 years elder than Romi = (y + 15).

So

Nisha's age 5 years ago = (y + 15 – 5).

Romi's age before 5 years = (y – 5)

5 years ago,

Nisha is 3 times as old as Romi

=> (y + 15 – 5) = 3 (y – 5)

=> (y + 10) = (3y – 15)

=> 2y = 25

⇒ y = 12.5

Romi's age = 12.5 years

Nisha's age = (y + 15) = (12.5 + 15) = 27.5 years.

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Answer 2

Let age of Romi be y

Nisha is 15 years elder than Romi = (y + 15). So Nisha's age 5 years ago = (y + 15 – 5).

Romi's age before 5 years = (y – 5)

5 years ago, Nisha is 3 times as old as Romi

(y + 15 – 5) = 3 (y – 5)

(y + 10) = (3y – 15)

2y = 25 ⇒ y = 12.5

Romi's age = 12.5 years

Nisha's age = (y + 15) = (12.5 + 15) = 27.5 years.