The age of Rani’s father was 49 years and he was 4 years more than 3 times the age of Rani, then what is the age of Rani ? 

Correct Answer - (i) 0.57 (ii) 0.43

Correct Answer - (i) 0.28 (ii) 0.4 (iii) 0.32

Given that \(\vec a, \vec b\) and \(\vec c\)are unit vectors. i.e., |\(\vec a\)| = |\(\vec b\)|  = |\(\vec c\)| = 1 And \(\vec a\) + \(\vec b\) + \(\vec c\) = \(\vec 0\) Then \((\vec a+\vec b+\vec c).(\vec a+\vec b+\vec c)=\vec 0.\vec...

Correct option is (A) x = 4y Given that age of x is 4 times of the age of y. \(\therefore\) x = 4y will represent the information.

C) (x + 5) years

Correct option is (D) none Let Ramu's present age be x years. \(\therefore\) Ramu's age before 4 years = (x - 4) years Ramu's age after 12 years = (x + 12) years \(\therefore\) x+12 = 3(x-4) \(\Rightarrow\) x+12...

Correct option is (C) 18 Let present ages of P and Q are respectively 3x and 8x. After 6 years, age of P = 3x+6, age of Q = 8x+6. According to given condition, \(\frac{3x+6}{8x+6}=\frac49\) \(\Rightarrow\) 9 (3x+6) =...

Let the present age of Shikha be ‘a’ years.  Given, product of Shikha’s age five years ago and her age 8 years later is 30  ⇒ (a – 5)(a + 8) =...