Question

Q.1.An electric engine is moving in north at 50 km/hr, smoke coming out will move
(a )north at 50 km/hr
(b) South at 50 km/hr
(c) vertically
(d) none
Q2. The salary of a person is increased by 10%, after one month due to recession the salary is
decreased by 10% net change is
(a) 0%
(b) 20%
(c) 1%
(d) None​

Answer 1

No Smoke will come out of electric engine  ,   1% Decrease in Salary

Step-by-step explanation:

it is an electric engine so there will not be any smoke

Hence no smoke will come out

none is the correct answer

Let say Salary of Person = 100S

Salary increased by 10 %

Salary = 100S = (10/100)100S  = 110S

Salary Decreased by 10 %

Salary = 110S - (10/100)110S

= 110S - 11S

= 99S

Change in salary = 100S - 99S  = S

% Change in salary = (S/100S) * 100 = 1%

1% Decrease in Salary

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