Test Index

SSC CGL Model Paper 1

© examsnet.com

Question : 62 of 100

Marks: +1, -0

The charges per hour of Uber cab ride are increased by 20%. Then find the percentage decrease in time period of ride of a commuter who can afford any 8% increase in expenditure?

5%
10%
$12\frac{1}{2}\%$
$8\frac{1}{2}\%$

Solution:

Expenditure = (charge/hr) × time period.

⇒ time period

=\frac{\text{expenditure}}{\text{charge/hr}}

Let initial expenditure be x

Initial charge/hr. be y

So, Time period (Initial) =

\frac{x}{y}

Also Time period (New) =

\frac{\frac{x \times 108}{100}}{\frac{y \times 120}{100}} = \frac{9x}{10y}

% Increase in time period

=\frac{ \frac{x}{y} - \frac{9x}{10y} }{ \frac{x}{y} } \times 100\% = 10\%

© examsnet.com

Go to Question:

Prev Question

Next Question