plz answer this unitary method question step by step??
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A one minute work=1/15
B one minute work=1/20
C one minute work=1/30
all together=1/15+1/20+1/30=3/20
all together work for 2 minute=3×2/20=3/10
remaining work=1-(3/10)=7/10
B and C work together for 4 minutes=(1/20+1/30)×4=1/3
remaining work=7/10-1/3=(21-10)/30=11/30
c does remaining work=11/30×30=11 minute
B one minute work=1/20
C one minute work=1/30
all together=1/15+1/20+1/30=3/20
all together work for 2 minute=3×2/20=3/10
remaining work=1-(3/10)=7/10
B and C work together for 4 minutes=(1/20+1/30)×4=1/3
remaining work=7/10-1/3=(21-10)/30=11/30
c does remaining work=11/30×30=11 minute
Akankshaaa:
thanks
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