Two-fifth of one-fourth of three-seventh of a number is 15. When is half of that number?
Two-fifth of one-fourth of three-seventh of a number is 15. When is half of that number? Correct Answer None of these
Let, the number be x 2/5 of 1/4 of 3/7 of x = 15 2/5×1/4×3/7× = 15 6x/140 = 15 6x = 15×140 6x = 2100 x = 350 Half of x is 175