If A,B,C are the mechanism used seperately to reduce the wastage of the fuel by 30%, 40%, 10% What will be the fuel economy if they were used Combined?

A. 68.4
B. 62.2
C. 58
D. 27
This question is related to TCS Interview

Editorial / Best Answer

mnotageek  

  • Member Since Jul-2007 | Jul 19th, 2007


ok let us suppose 100 kg of fuel is being wasted.. if i use the A then 30 kg will be saved n 70 kg will be wasted. now if i bring in B it will save 40% of 70 n (70*0.6)=42 kg will be wasted. Now if i incorporate C then it will save 10%of 42 i.e..,(42*0.9) 37.8 kg will be wasted... so 100-37.8=62.2 kg will be saved.. so ans is 62.2%

Showing Answers 1 - 2 of 2 Answers

mnotageek

  • Jul 19th, 2007
 

ok let us suppose 100 kg of fuel is being wasted.. if i use the A then 30 kg will be saved n 70 kg will be wasted. now if i bring in B it will save 40% of 70 n (70*0.6)=42 kg will be wasted. Now if i incorporate C then it will save 10%of 42 i.e..,(42*0.9) 37.8 kg will be wasted... so 100-37.8=62.2 kg will be saved.. so ans is 62.2%

ramesh

  • Sep 22nd, 2007
 

Answer will be 62.2 because,
= (70/100)*(60/100)*(90/100)
= 0.378
=37.8 in%
=>100-37.8
=62.2

The Fuel economy efficiency for A,B,C will be 1/3,1/4 and 1/10 respectively

Hence the combined Fuel Economy efficiency will be (1/3+1/4+1/10)=41/60

in % form it will be (41/60)x100=68% approx.

  Was this answer useful?  Yes

Siddhubias

  • Apr 21st, 2010
 

Let each mechanism solution is 100 litre.

In "A" mechanism, wastage is (100-30)/100 = 70 %
In "B" mechanism, wastage is (100-40)/100 = 60 %
In "C" mechanism, wastage is (100-10)/100 = 90 %

If all are combined,total solution = 300 litres
                   Total wastage  = 220 litres
                   Total used fuel = 80 litres

So, wastage in 100 litres = 80/3 litres
               % wastage = 26.6666.... %
               = 27 % (approx)

  Was this answer useful?  Yes

Mudit

  • Jan 24th, 2017
 

How can you apply efficiency on wasted fuel?

  Was this answer useful?  Yes

Anirudh Dayma

  • Jul 11th, 2017
 

assume total =100 then 30% = 70, 40% reduction = 3/5 and 10% reduction = 9/10. Therefore total reduction = 70X(3/5)X(9/10) = 37.8 therefore ans = 100 - 37.8 = 62.2

  Was this answer useful?  Yes

Give your answer:

If you think the above answer is not correct, Please select a reason and add your answer below.

 

Related Answered Questions

 

Related Open Questions