Question 46

Find the value of $$5y \sqrt{y^3 - y^2}$$ when $$y = 5$$

Solution

Substituting y=5

Equation becomes

$$ 5 \times 5 \sqrt{5^3-5^2} $$

$$ = 25 \sqrt{125-25} $$

$$ = 25 \sqrt{100} $$

$$ = 25 \times 10 $$

    =250


Create a FREE account and get:

  • Download RRB Study Material PDF
  • 45+ RRB previous papers with solutions PDF
  • 300+ Online RRB Tests for Free

cracku

Boost your Prep!

Download App