The value of constant of variation is 50. The average cost of construction of one pier of the bridge is Rs. 45000. Estimate the economic span of the bridge.
- A24 m
- B26 m
- C28 m
- D30 mCorrect
Solution
Concept
Economic span
Formula
L = √(P/K)
Step-by-step solution
1. L = √(45000/50) = 30 m.
Explanation
Cost of piers equals cost of superstructure.
Why the other options are wrong
Others do not follow.
Correct answer: D) 30 m