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Sagar is 20% more efficient than Pranesh. If Pranesh can complete a piece of work in 30 days, then in how many days can both Sagar and Pranesh complete the work?
a) (11+5/11) days b) (13+7/11) days
c) (15+5/11)days d) (17+7/11) days

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anw is b
efficiency ratio is s:p=120:100=6:5; then time ratio is s:p=5:6
6parts=30days then 1 part =5
then sagar can complete the whole work in 25 days
their 1 day work is 1/30+1/25=11/150=1/(150/11)
so they both complete the work in 150/11 days
12 years agoHelpfull: Yes(9) No(0)

p=30,
s=20% of p, so s=25
L.C.M(30,25)=150
p=150/30=5, s=150/25=6
one day work of p&s=11, total work =150
so 150/11=(13+7/11)days
12 years agoHelpfull: Yes(2) No(0)

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