Список проголосовавших за комментарий "Михаил Шварц, не, пишут правильно. но 60 метров это для обычной породы. А по факту можно и три метра не пройти, хотя бы из-за этого — <a href="/r.php?u=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FImpact_depth&s=2251764958">en.wikipedia.org/wiki/Impact_depth</a> . <br/> <br/> <ul><li><strong>Penetration</strong>: (debated) Up to 60 m (200 ft) of unspecified material.<sup><a href="/r.php?u=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FGBU-57A%2FB_MOP%23cite_note-40&s=107458934">[40]</a></sup></li></ul>Another source reports penetration up to 60 m (200 ft) into 5,000 psi (34 MPa) reinforced concrete, and 8 m (26 ft) into 10,000 psi (69 MPa) reinforced concrete; the source suggests those distances could be mistakes and «may in fact be first in feet, not meters». If so, penetration would be up to 18 m (60 ft) into 5,000 psi (34 MPa) reinforced concrete, and 2.4 m (8 ft) into 10,000 psi (69 MPa) reinforced concrete.<sup><a href="/r.php?u=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FGBU-57A%2FB_MOP%23cite_note-41&s=2646801689">[41]</a></sup><br/> <br/> <br/> "