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CBSE Class 11-science Answered

A man is employed to count Rs1710.He counts at the rate of Rs180 per minute for half an hour.After this he coun ts at the rate of Rs3 less every minute than the preceding minute.Find the time taken by him to count the entire amount.
Asked by Anindya | 06 Sep, 2014, 11:53: AM
answered-by-expert Expert Answer
R a t e space o f space c o u n t i n g equals R s.180 space p e r space m i n u t e T o t a l space a m o u n t space o f space m o n e y space c o u n t e d space i n space 30 space m i n u t e s equals 180 cross times 30 equals R s.5400 R e m a i n i n g space a m o u n t space o f space m o e n y equals R s.10710 minus R s.5400 equals R s.5310 N e w space c o u n t i n g space r a t e equals R s.177 space p e r space m i n u t e. T h u s comma space t i m e space t a k e n space t o space c o u n t space t h e space r e m a i n i n g space m o n e y equals 5310 over 177 equals 30 space m i n u t e s T o t a l space t i m e space t a k e n equals 30 space m i n u t e s space plus space 30 space m i n u t e s equals space 1 space h o u r
Answered by Vimala Ramamurthy | 08 Sep, 2014, 10:44: AM

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