8 men can build a foundation 18m long,2m broad and 12m high in 10 days ,working 9 hours a day. find how many men will be able to build a foundation 32m long,3m broad and 9m high in 8days working 6hrs a day?

• men*day*time/capacity=const
  (8*10*9)/(18*2*12)=(x*8*6)/(32*3*9)
  x=30 men
• 12 years agoHelpfull: Yes(16) No(0)
• (8/32)*(2/3)*(12/9)*(8/10)*(6/9)=8/x
  x=30
  (by chain rule)
  
• 12 years agoHelpfull: Yes(5) No(0)
• thank u but the options given are
  a. 27
  b.30
  c.33
  d.36
• 12 years agoHelpfull: Yes(2) No(0)
• By using chain rule we get,30 men.
• 12 years agoHelpfull: Yes(2) No(0)
• 8:(8*2*12):(10*9)=x:(32*3*9):(6*8)
  (8*10*9)/(18*2*12)=(x*8*6)/(32*3*9)
  on solving
  x=30 men ans
• 12 years agoHelpfull: Yes(2) No(0)
• it is solved by the rule of three.... (chapter Ratio & proportion)
  we are given to calculate no. of mens so
  simple reasoning--->> a) foundation has increased so ---->> more men
  b) days decreased--->> more men
  c) working hours decreased ---->> more men
  we have to look for the required value i.e men
  so taking the no. of mens given value as 8
  since days have decreased so we will require more men i.e have to multiply 8 by greater fraction(i.e whose numerator is greater than denominator) in terms of days i.e 8*10/8
  similarly for working hrs as:- 8* 10/8 * 9/6 = 15 mens ans
• 12 years agoHelpfull: Yes(0) No(8)