A make a wall in 9 hour. B makes a wall in 10 hour. When doing together 10 more bricks are required and together make a wall in 5 hour. How many bricks r there in the wall?

190

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rekha

  • Oct 14th, 2006
 

How this comes??????

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veena

  • Jun 15th, 2007
 

Please give explanation how can you get the answer as 190.

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shrikant67

  • Jan 6th, 2011
 

'a' can make in -9hr
'b' can make in -10hr
so both can make in 9*10/19=90/19

But with 5 hrs 10 bricks more required
5 x+10
90/19 x
x=180

10 more i.e.190

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