Question

Question:-
Anu and Bina take 240 h to finish a
task. Bina can finish it alone in 30
days, working for half a day, every
day. How many days will Anu take,
working 10 h a day, to finish the task?​

Answer 1

Given :- Anu and Bina take 240 h to finish a task. Bina can finish it alone in 30 days, working for half a day, every day. How many days will Anu take, working 10 h a day, to finish the task ?

Solution :-

given that,

→ Anu and Bina can finish a task in = 240 h .

So,

→ Per day work of (Anu + Bina) = 1/240 .

also,

→ Total days taken by Bina to finish the task alone = 30 days.

and,

→ Bina works per day = 12 hours.

then,

→ Total time taken by Bina = 12 * 30 = 360 hours.

then,

→ Per day work of Bina = 1/360 .

therefore,

→ Per day work of Anu = 1/240 - 1/360 = (3 - 2)/720 = 1/720 .

hence,

→ Time taken by Bina to finish the task = 720 hours = (720/10) = 72 days. (Ans.)

Learn more :-

Giri does 2/5 piece of work in 10 days. Ankit does 5/9 of the remaining work in 15 days and Gaurav finishes remaining wo...

https://brainly.in/question/21025557