Question

shanu and pawan working alone can finish a piece of work in 10 days and 15 days respectively.if shanu and pawan work together, bur shanu leaves the job after 2 days. how much of the work is left then?
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Answer 1

Answer:

Step-by-step explanation:

The work completed by both in 2 days is

2( 1/15 + 1/10) = 1/3

1/3 work done by both remaining is 1-1/3=2/3

Answer 2

Solutions :-

Given :
Shanu and Pawan working alone can finish a piece of work in 10 days and 15 days respectively.


Shanu's one day work = 1/10

Pawan's one day work = 1/15


(Shanu + Pawan)'s one day work = 1/10 + 1/15
= (3 + 2)/30
= 5/30 = 1/6

(Shanu + Pawan)'s two days work = 1/6 × 2
= 1/3


We know that,
Total work = 1
Work done by Shanu and Pawan = 1/3

Remaining work = 1 - 1/3
= (3 - 1)/3
= 2/3


Hence,
Remaining work = 2/3