The area of a square is 16x² + 40x + 25 square units. Find the perimeter of the square.
2(8x + 10)
The area of a square is side². Factorize the given quadratic: 16x² + 40x + 25 = (4x + 5)². The side of the square is 4x + 5. Perimeter = 4 × side = 4 × (4x + 5) = 16x + 20 = 2(8x + 10).
Important Questions from Number System
A frog was at the bottom of an 80 m deep well. It attempted to come out of it by jumping. In each jump, it covered 1.15 m but slipped down by 0.75 m. The number of jumps after which it would be out of the well is:
The smallest perfect square number divisible by each of 6 and 12 is:
The L.C.M. of two different numbers are 30. Which of the following cannot be their H.C.F.?
Which is the least four-digit number which when divided by 5, 6 and 8 leaves remainder 2 in each case?
- A number when divided by 5 leaves a remainder 3.
What is the remainder when its square is divided by 5?
