2012 · Q70
The base of a triangular wall is 7 times its height. If the cost of painting the wall at Rs. 350 per 100 square meter is Rs. 1225, then what is the base length?
Elementary MathematicsMensuration
- A50 m
- B70 m
- C75 m
- D100 m
Explanation
Area = 1225*100/350 = 350 sq m; (1/2)(7h)(h) = 350 gives h = 10 m, so base = 70 m.