Question

Umesh and Rajkumar together can do a piece of work in 15/2days. If Umesh alone can
do the same work in 20 days, how long will Rajkumar take to do it alone?
​

Answer 1

Gɪᴠᴇɴ :-

• Umesh and Rajkumar together can do a piece of work in 15/2days.
• Umesh alone can do the same work in 20 days.

Tᴏ Fɪɴᴅ :-

• How long will Rajkumar take to do it alone ?

Sᴏʟᴜᴛɪᴏɴ :-

→ (Umesh + Rajkumar) can do a piece of work in = 15/2 days.

→ Per Day work of (Umesh + Rajkumar) = (2/15) units.

Similarly,

→ Umesh alone can do the same work in = 20 days.

→ Per day work of Umesh = (1/20) units .

Therefore,

→ Per day work of Rajkumar = (2/15) - (1/20) = (8 - 3)/60 = (5/60) = (1/12) units.

Hence,

→ Rajkumar alone can do the same work in = 12 Days (Ans.)

Answer 2

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✅$\huge{Question:-}$

Umesh and Rajkumar together can do a piece of work in 15/2days. If Umesh alone can

do the same work in 20 days, how long will Rajkumar take to do it alone?

✅$\huge{Answer:}$

$\large{Given:}$

Umesh and Rajkumar together can do a piece of work in 15/2days.

Umesh alone can do the same work in 20 days.

$\large{To\:Find:}$

How long will Rajkumar take to do it alone ?

$\large{Solution:}$

✔Umesh and Rajkumar can do a piece of work in = 15/2 days.

✔Work done in one day = (2/15) units.

Now,

✔Umesh alone can do the same work in = 20 days.

✔Work done by Umesh in one day = (1/20) units .

so,

✔Work done by Rajkumar in one day = (2/15) - (1/20) = (8 - 3)/60 = (5/60) = (1/12) units.

So,

⭐Rajkumar alone can do the same work in = 12 Days

➡️Hope it helps you :)

#Regards❤