A is twice as fast as b. If b alone can do a piece of work in 30 days, in what time can a and b together complete the work?
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Let work of b = x
work of A=2x
a/q
x+2x=30,3x=30
x=10,so work of a =.20and b =10
together in one day = 1/20+1/10= 1+2/20
3/20=20/3.answer
work of A=2x
a/q
x+2x=30,3x=30
x=10,so work of a =.20and b =10
together in one day = 1/20+1/10= 1+2/20
3/20=20/3.answer
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