2) If A, B and C are the mechanisms used separately to
reduce the wastage of fuel by 30%, 20% and 10%. What will be
the fuel economy if they were used combined.

100 of 30% is 30 so remaining 70
now 70 of 20% is 14 so remaining 56 and
56 of 10% is 5.6 so remaining 50.40.
so 50.40 is remaining fuel wastage and reduce of fuel
wastage is 100-50.40=49.6%

 Is This Answer Correct ? 10 Yes 9 No

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53

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56

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72

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50

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80

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57

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1367

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56

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62

rrb second stage written exam in aptitude test model papers

2654

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58

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53

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79

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54

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39