SSC CGL Model Paper 1

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%
$12 1/2%$
$8 1/2%$

Validate

Solution:

Expenditure = (charge/hr) × time period.
⇒ time period

=\expenditure /(\charge\/\hr)

Let initial expenditure be x
Initial charge/hr. be y
So, Time period (Initial) =

x/y

Also Time period (New) =

{x×108/100}/{y×120/100}={9x}/{10y}

% Increase in time period

={x/y-{9x}/{10y}}/{x/y}×100%=10%

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