Question

3.​Chris is going on holiday to the United States of America.



The exchange rate is £1 = $1.55
Chris has up to £720 to change into dollars but he can only get $20 or $50 notes.
What is the maximum number of dollars Chris can get?

Answer 1

Given : The exchange rate is £1 = $1.55

Chris has up to £720 to change into dollars but he can only get $20 or $50 notes.

To Find : the maximum number of dollars Chris can get

Solution:

£1 = $1.55

=>  £720 = $ 720 * 1.55 = 1116 $

As $20 or $50 notes are available hence amount should end up in Zero  

maximum number of dollars Chris can get  = 1110 $

One of the option for that  is  

50 * 21 +  20 * 3  =  1110

maximum number of dollars Chris can get  = 1110 $

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