Class starts in 20 minutes,
Are you excited?


https://www.youtube.com/live/9Nb7bPSDOHk?si=Sc3r7zXVlpJaTuaW

Mandatory Session for all, sab LIVE aao✅

LIVE🔥: DI ke 15 Marks Aaj Pakke

https://www.youtube.com/live/9Nb7bPSDOHk?si=Sc3r7zXVlpJaTuaW

Mains Infinity 2026 Class is Live on Yesofficer:

1) Login to Yesofficer
2) Go to My Time Table
3) Join the Class at 7:00 am

SBI PO Pre Mock Test 6 Published in Officer Lab🔥

Available on Yesofficer app and website

UDAAN 2.0 2026
DI Class is Live on Yesofficer:

1) Login to Yesofficer
2) Go to My Time Table
3) Join the Class at 7:00 am

SBI PO + IBPS PO Students,

Something Huge for you⬇️

https://www.youtube.com/live/ZAwOeRmMD3U?si=pi4LqU96es0RIWrl

There will be no 7 AM class on YesOfficer for the next three days: Friday, Saturday, and Sunday.

This decision has been taken so that you can focus fully on your revision and practice.

Use these three days properly. Revise fast, practice seriously, and stay consistent.

Good luck. Let’s meet on Monday.

Class starts in 20 minutes

https://www.youtube.com/live/ZAwOeRmMD3U?si=J5f1yl7NFa2rwb4u

LIVE NOW🔥🔥

https://www.youtube.com/live/ZAwOeRmMD3U?si=J5f1yl7NFa2rwb4u

Mains Infinity 2026 Class is Live on Yesofficer:

1) Login to Yesofficer
2) Go to My Time Table
3) Join the Class at 7:00 am

First DI from Today’s Mains Class was Beautiful,

It contains some Important Concepts like,

1. Still Water Speed & Stream Speed

Downstream Speed = Boat + Stream
Upstream Speed = Boat − Stream

⸻

2. Floating Object (Log) Theorem

A floating object always moves with the stream.

⸻

3. Relative Speed with a Floating Object

When a boat and a log move in the same direction,

Relative Speed = Boat’s Still Water Speed

Stream completely cancels.

This is one of the most important hidden concepts.

⸻

4. Time–Relative Speed Inverse Theorem

For the same initial gap,

Relative Speed ↑ ⇒ Time ↓

Useful when two different boats chase the same floating object.

⸻

5. Same Point, Same Time Principle

If two moving objects reach the same destination at exactly the same instant,

their positions can be equated to derive hidden information.

⸻

6. Round Trip Time Splitting

When total journey time is given,

split into

Downstream Time
Upstream Time

before solving.

⸻

Intermediate Concepts

7. Backward Motion Reconstruction

Sometimes the question asks about something before observation starts.

You reconstruct past motion instead of future motion.

⸻

8. Initial Lead (Head Start) Concept

When one object is caught after some time,

first determine

Initial Separation = Relative Speed × Time

This becomes fixed information for later questions.

⸻

9. Position Tracking

Instead of only calculating distance travelled,

track the exact position of every object on the river at every stage.

This DI repeatedly uses position tracking.

⸻

10. Timeline Segmentation

Do not treat the entire motion as one journey.

Break it into phases like

before meeting
before turning
after turning
after second meeting

Check Studified YouTube, Apke liye kal ki jo class lagaai hai.

You will be very happy.

Jaao dekho.

Waiting for this🤨

UDAAN 2.0 2026
DI Class is Live on Yesofficer:

1) Login to Yesofficer
2) Go to My Time Table
3) Join the Class at 7:00 am

Mandatory for you!

10 am: https://www.youtube.com/live/o9BFST_L4dI?si=mhvOCjoEY9E05kKp

Live now🔥🔥⬇️

Click here to join

https://www.youtube.com/live/o9BFST_L4dI?si=mhvOCjoEY9E05kKp

Break is over🔥🧿🌶️🍋

Jaldi aao, aaj bacho ki excitement dekh ke meri energy bhi double hai

https://www.youtube.com/live/o9BFST_L4dI?si=mhvOCjoEY9E05kKp

Mains Infinity 2026 Class is Live on Yesofficer:

1) Login to Yesofficer
2) Go to My Time Table
3) Join the Class at 7:00 am

आपका पता नहीं, मैंने 6th Gear लगा दिया है 😃

See ⬇️

https://www.youtube.com/live/tYP3ODJUrQ0?si=lwi6930VMs86dM5j

📌 Homework Reminder

Just a reminder for tomorrow evening’s homework.

You have to complete the last two classes of the previous Udaan Pre-DI course (not the current one).

Please make sure you watch and finish both of the last DI classes from the previous Pre-DI course before tomorrow evening.