please ans the question no 5.
Math
ravi2070
Question
please ans the question no 5.
1 Answer

1. User Answers Anonym
Answer:
(i)Together in 10 days
(ii) They can finish the work individually as:
a=30 days
b=60 days
c=20 days
Stepbystep explanation:
one day work of a and b =a+b=1/20
one day work of b and c =b+c=1/15
one day work of c and a =c+a=1/12
adding we get
a+b+b+c+c+a=1/20+1/15+1/12
2(a+b+c)=1/60(3+4+5)=12/60=1/5
a+b+c=1/10
one day work of a and b and c=1/10
so the will complete the work together in 10 days
Now a=(a+b+c)(b+c)=1/101/15=32/30=1/30
b=(a+b+c)(a+c)=1/101/12=65/60=1/60
c=(a+b+c)(a+b)=1/101/20=1/20
hence they can finish the work individually as:
a=30 days
b=60 days
c=20 days