Answer:
2.4 hours 
Step-by-step explanation:
Let total work = X
Rate of work done = X ÷ time
Rate of A = X/4
Rate of B = X/6
If they work together, rate is the sum of their individual rates, i.e.
X/4 + X/6
= (3X + 2X)/12 (taking LCM)
=5X/12
Rate = X/time
5X/12 = X/time
time = X÷(5X/12)
time = X × 12/(5X)
time = 2.4 hours
Shortcut:
Product of individual times/sum of individual times
= (4×6)/(4+6)
=24/10
=2.4 hours
 
        
                    
             
        
        
        
I think it's 30 meters
 I hope it helps
        
             
        
        
        
Answer:
I think the answer is 10 full 6Kg boxes
my first answer if you saw it was miscalculated, sorry.
 
        
                    
             
        
        
        
10% of 65 
Of means multiply
=0.1 x 65
=6.5 
Or you can use another way which is (part/whole) *(percent/100) 
Whole=65 
Percent=10
And part(part of 65)=unknown 
(X/65)* (10/100) 
Cross multiply 
x= 6.5 
So 10% of 65 is 6.5
        
             
        
        
        
Answer:

Step-by-step explanation:
Given
x² + x
To complete the square
add ( half the coefficient of the x- term )² to x² + x
x² + 2( )x + (
 )x + ( )² = x² + x +
 )² = x² + x + 
= (x +  )² ← perfect square
 )² ← perfect square