Instructions

What approximate value will come in place of the question mark (?) in following equations ?

Question 139

$$42.07 \times 7.998 + (?)^{2} = 20^2$$

Solution

Share

Expression : $$42.07 \times 7.998 + (?)^{2} = 20^2$$

=> $$(42 \times 8) + (?)^2 = 20^2$$

=> $$?^2 = 400 - 336 = 64$$

=> $$? = \sqrt{64} = 8$$

Was this solution helpful?

Get AI Help

Create a FREE account and get:

  • Banking Quant Shortcuts PDF
  • Free Banking Study Material - (15000 Questions)
  • 135+ Banking previous papers with solutions PDF
  • 100+ Online Tests for Free

Join CAT 2026 course by 5-Time CAT 100%iler

Start your IIM journey with the right preparation and crack CAT 2026.

Enroll Now
Ask AI