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Start learning 50% faster. Sign in nowLet the work ‘A’ and ‘B’, can do in 1 day be ‘a’ units and ‘b’ units, respectively. Let they takes ‘p’ days to build the wall, together Therefore, Total work = (a + b) × p units …….. (1) According to the question, Time taken by ‘A’ to build the wall alone = 1.15p days Therefore, total work = 1.15p × a units….. (2) From equation (1) and (2), we get 20b/3 = a Therefore, total work to be done = (a + b) × p = (23bp)/3 units Time taken by 'B' to build the wall = 23bp/3b = 23p/3 days Therefore, required percentage = (23p/3 – p)/p} × 100 = 666.66% more time
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