Question

A and B take 6hours and 9hours respectively to complete the work. A works 1hour and then B works 2hours
How much work is done in these 3 hours . How much work is still left

Answer 1

Answer:

a (6 hours) and b (9hours) lcm hain 18 work

iska matlab a 3 work aur b 2 work karta hain 1 hours main.

now a 1 hours main 3 work karta hain.

B 1 Hours main 2 hours main 4 kam karte hain.

total work (18-7) = 11 work reh gaya Abhi.

Answer 2

✪ Question :- A and B take 6hours and 9 hours respectively to complete the work. A works 1hour and then B works 2 hours . How much work is done in these 3 hours . How much work is still left ?

✰ Solution :-

Given that , A can complete the work in = 6 hours.

That means, A can do = (1/6) unit of work per hour.

Also, B A can complete the work in = 9 hours.

That means, B can do = (1/9) unit of work per hour.

Than , B will do work in 2 hours = 2 * (1/9) = 2/9 unit of work.

So, Total work done by A + B in 3 hours = (1/6) + (2/9)

→ (3+4)/18

→ (7/18) unit of work done.

Now, work left to be done = 1 - (7/18) = (11/18) unit of work.