Question

A square field 40acres in area is surrounded by a path 30ft wide .How many stones each 2ft by 1ft 6in will be required for paving the path

Answer 1

.Bryophyta - a division of nonflowering plants characterized by rhizoids rather than true roots and having little or no organized vascular tissue and showing alternation of generations between gamete-bearing forms and spore-bearing forms; comprises true mosses (Bryopsida) and liverworts (Hepaticopsida) and hornworts ( ...