The approximate age of the Aravallis range is : (a) 370 million years (b) 470 million years (c) 570 million years

Let , the present age of Ravi be x Ravi's age after fifteen years = x+15 a\q, =>x+15 = 4x => 4x-x =15 => 3x =15 => x = 15/3 => x = 5 so,present age of Ravi...

At present, _________ Shobo's age = x years His mother's age = 6 times of  Shobo's age = 6x years Five years from now  ________________ Shobo's age = ( x + 5 ) years According to the problem given, x...

Son age be x Aman age is 3x ten years ago son age x-10 aman age 3x -10 A/Q 5(x-10) = 3x -10  5x -50 = 3x - 10 2x = 40 x =20 3x=60 son present age =20 aman present age = 60

(b) Let Seema’s present age be x years.  Then, Seema’s son’s present age = x/4 years  Seema’s father’s present age = 7x/4 years.  Then, x+ x/4 +7x/4= 32x3  12x = 96 × 4  x = 96...

(b) Age of the fourth friend = 31 × 4 - 32 × 3 = 124 - 96 = 28 years

The correct answer is (c)

The answer is (A) Brahmagiri range

(c) Aravallis 

(d) Iron age

(a) Chalcolithic age