Question

2)
The number which when added to its half gives 30. The number is
(a) 10
(b) 20
(C) 40
(d) 60​

Answer 1

The required number is "20".

Step-by-step explanation:

Let number = x

According to question,

x + $\dfrac{x}{2}$ = 30

⇒ $\dfrac{2x + x}{2}$ = 30

⇒ 3x = 30 × 2 = 60

⇒ x = $\dfrac{60}{3}$ = 20

Hence, the required number is "20".

Answer 2

Step-by-step explanation:

Let number = x

According to question,

x + \dfrac{x}{2}

2

x

= 30

⇒ \dfrac{2x + x}{2}

2

2x+x

= 30

⇒ 3x = 30 × 2 = 60

⇒ x = \dfrac{60}{3}

3

60

= 20

Hence, the required number is "20".