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CBSE Class 8 Answered

Suresh and Babu can complete a piece of work in 35 days while Suresh alone can complete the same work in 60 days. In how many days Babu alone will be able to complete the same work ?
Asked by Manju | 21 Aug, 2016, 05:42: PM
answered-by-expert Expert Answer
begin mathsize 14px style T i m e space t a k e n space b y space S u r e s h space a n d space B a b u space t o space c o m p l e t e space a space p i e c e space o f space w o r k equals 35 space d a y s T i m e space t a k e n space b y space S u r e s h space t o space c o m p l e t e space t h e space s a m e space w o r k equals 60 space d a y s rightwards double arrow S u r e s h space a n d space B a b u apostrophe s space 1 space d a y apostrophe s space w o r k equals 1 over 35 S u r e s h apostrophe s space 1 space d a y space w o r k equals 1 over 60 N o w comma space B a b u apostrophe s space 1 space d a y apostrophe s space w o r k equals left parenthesis S u r e s h space a n d space B a b u apostrophe s space 1 space d a y apostrophe s space w o r k right parenthesis minus left parenthesis S u r e s h apostrophe s space 1 space d a y space w o r k right parenthesis equals 1 over 35 minus 1 over 60 equals fraction numerator 12 minus 7 over denominator 420 end fraction equals 5 over 420 equals 1 over 84 H e n c e comma space B a b u space c a n space c o m p l e t e space t h e space w o r k space i n space 84 space d a y s. end style
Answered by Rashmi Khot | 22 Aug, 2016, 09:05: AM

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