# Conveyor belt brain teaser [closed]

Okay folks, I'm keen to get a response to this brain teaser!!!

Let's say you're looking at a conveyor belt... The width = 2m, and the length = 10m.

Okay... This conveyor belt is moving from right to left at 1m/sec , meanwhile, you're scanning across the conveyor belt from right to left at 2m/sec. (so you're scanning just faster than the conveyor belt is moving).

What is the total area of the conveyor belt that you have scanned.

(Takes 5 seconds to scan from right to left).

OKAY... Next.. let's give you all two more scenarios...

What is the area if:

A) Conveyor belt is moving right to left at 1m/sec, But you are scanning LEFT to RIGHT at 2m/sec?

B) Conveyor belt is moving right to left at 2m/sec, but you are scanning RIGHT to LEFT at 1m/sec (moving slower than the machine)?

## closed as off-topic by Sconibulus, Rubio♦, JonMark Perry, Beastly Gerbil, Ian MacDonaldApr 3 '17 at 20:10

This question appears to be off-topic. The users who voted to close gave this specific reason:

• "This question is off-topic as it appears to be a mathematics problem, as opposed to a mathematical puzzle. For more info, see "Are math-textbook-style problems on topic?" on meta." – Sconibulus, Rubio, JonMark Perry, Beastly Gerbil, Ian MacDonald
If this question can be reworded to fit the rules in the help center, please edit the question.

• $2*(10-5)$, $2*(10+5)$, $2*(10+20)$. – Ian MacDonald Apr 3 '17 at 20:13