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
Answer:
1728 for A
7290000 for B
Step-by-step explanation:
Answer:
Step-by-step explanation:
324
-54 -6
-18 3 -2
6 -3 -1 2
-2 -3 1 -1 -2
C
explanation : the equation is division and since you don’t know what the variable x is, you multiply 3 and 12 to find x
