- A220
- B180
- C200
- D400
Step-by-Step Solution
Slant sides are 5 m and 15 m; extra length = 15 - 5 = 10 m. Extra cost = = Rs 200.
Answer: C) 200
Two ladders lean against a wall. The smaller forms a triangle with the ground of sides 3 m, 4 m, 5 m. The larger ladder forms a triangle that is similar with the longest side 15 m.
If the cost of safety tape is Rs 20 per metre for the slanting side (the 5 m / 15 m side), how much extra (in Rs) does the larger ladder's slant cost over the smaller?
Class 10Criteria for SimilarityGeometry — Similarity
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