A and B can do a piece of work, in 15 days and 20 days respectivelyFin

1.	A and B can do a piece of work, in 15 days and 20 days respectivelyFind (i) The work done by A in 3 days (ii) The work left after A has worked for 3 days.(iii) The number of days that B will take to complete the remaining work.
Answer» Step-by-step explanation: R.E.F image A→ 20 days B→ 15 days Let US SAY. 60 unit work was there & C = x unit/DAY. A = 3 unit/Day B=4 unit /Day. A+B = 7×6=42 unit work done by A & B. LEFT (60-42) unit = 10 unit will be done by A&C A+C=(3+x)×4=10⇒12+4x=10⇒x= 4 6 =2.5 day unit . C Alone could do the work. = 1.5unit/day 6.0unit = 40 day

A and B can do a piece of work, in 15 days and 20 days respectivelyFind (i) The work done by A in 3 days (ii) The work left after A has worked for 3 days.(iii) The number of days that B will take to complete the remaining work.

Answer»

Step-by-step explanation:

R.E.F image

A→ 20 days

B→ 15 days

Let US SAY. 60 unit work was there & C = x unit/DAY.

A = 3 unit/Day

B=4 unit /Day.

A+B = 7×6=42 unit work done by A & B. LEFT

(60-42) unit = 10 unit will be done by A&C

A+C=(3+x)×4=10⇒12+4x=10⇒x=

=2.5

day

unit

C Alone could do the work.

1.5unit/day

6.0unit

= 40 day