Question

The amount of Alpha rays received in two minutes is how much more/less than the amount of Radio waves received in four minutes?

• A. 1320 units more
• B. 1200 units less
• C. 1440 units less
• D. 1600 units more

Hint:

For "more/less" questions, always compute \(A - B\). A negative result means "A is less than B by \(|A-B|\)"; a positive result means "more by".

Answer 1

The Correct Option is C

Step 1: Compute Alpha in 2 minutes. 
Alpha share \(= 10\%\) \(\Rightarrow\) Alpha/min \(= 0.10 \times 3600 = 360\) units/min. 
Alpha in \(2\) minutes \(= 360 \times 2 = 720\) units. 

Step 2: Compute Radio waves in 4 minutes. 
Radio share \(= 15\%\) \(\Rightarrow\) Radio/min \(= 0.15 \times 3600 = 540\) units/min. 
Radio in \(4\) minutes \(= 540 \times 4 = 2160\) units. 

Step 3: Compare (Alpha vs Radio). 
Difference \(= \text{Alpha in 2 min} - \text{Radio in 4 min} = 720 - 2160 = -1440\) units. 
Negative sign means Alpha is less by 1440 units. 

Step 4: Conclude. 
\(\boxed{1440\ \text{units less}}\).