A ladder has rungs 25 cm apart . The rungs decreases uniformaly in length from 45cm at the bottom to 25 cm at the top .If the top and the bottom rungs are 2 1/2 m apart , what is the length of the wood required for the rungs. #Hint :- No. of rungs =250/25+1.
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shivansh9340:
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DISTANCE BETWEEN FIRST AND LAST RUNGS=2.5M=250CM
DISTANCE BETWEEN FIRST AND SECOND RUNGS=25CM
NUMBER OF RUNGS=250/25+1=11 RUNGS
So length of wood = Sn = n/2 (a + l )
=11/2 (45+25 )
=11/2 (70)
=385 cm
i hope its hlp you
DISTANCE BETWEEN FIRST AND SECOND RUNGS=25CM
NUMBER OF RUNGS=250/25+1=11 RUNGS
So length of wood = Sn = n/2 (a + l )
=11/2 (45+25 )
=11/2 (70)
=385 cm
i hope its hlp you
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