ICSE − Q & A

http://www.respaper.com/icse_prelims/358/876/5670-pdf.html can anyone please answer q.6 c)

A tank can be filled by a pipe in x mins and emptied in (x+5) mins.both the pipes together can fill an empty tank in 16.8 mins.find x[pls show working also]
Thanx in advance

Ans.this question

a triangle of bace BC is 4.5 cm , 

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