alleryA rectangle is 4 cm longer than wide and has perimeter 40 cm. Its length is
A8 cm
B10 cm
C12 cm
D16 cm
Answer & Solution
Correct answer: C. 12 cm
Length plus breadth is 20 and their difference is 4, so length is 12 cm.
Keep practising Elementary Algebra
Browse all Elementary Algebra questions for RRB NTPC, or explore more Mathematics topics.
Related questions
RRB NTPC · Algebraic ExpansionsRRB NTPC · Solving Linear EquationsExpand and simplify the algebraic expression: (x + 3)(x - 3)Evaluate the quadratic expression 2x^2 + 5x - 4 when x = 3:If a + b = 10 and a - b = 4, what is the value of a?Solve for x: 3x - 7 = 14. What is the value of x?RRB NTPC · Solve Linear EquationsWhen a system of two lines on the plane has no intersection, what is its solution set?