RRB NTPC · Question 105
The length of a rectangular board is 4 times that of its breadth. If the area of the board is 256 sq. meters, find its length.
Show answer & explanation
Answer: (D) 32 m
Explanation
Area = 4b × b = 4b² = 256, so b² = 64 and b = 8 m. Length = 4 × 8 = 32 m.