a and b together finish a work in 30 days they worked for it 20 days and then b left the remaning work done by alone in 20 more days b alone can finish the work in
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(a+b)20 +a(20)=1
1/30 ×20 +20a=1
2/3 +20a=1
20a=1-2/3
20a=3-2/3
20a=1/3
a=1/20×3
a=1/60
a+b=1/30
b=1/30-1/60
b=2-1/60
b=1/60
b can complete in 60 days
1/30 ×20 +20a=1
2/3 +20a=1
20a=1-2/3
20a=3-2/3
20a=1/3
a=1/20×3
a=1/60
a+b=1/30
b=1/30-1/60
b=2-1/60
b=1/60
b can complete in 60 days
hatty:
you are best
thx hatty
tnx you
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