Answer:
10
Step-by-step explanation:
Rate of drainage for pump A and B = [1 pool drained]/[6 hours]
Rate of drainage for pump A (older pump) = [1 pool drained]/[15 hours]
Rate for pump B (newer pump) = [1 pool drained]/[t hours]
Thus, adding the rate of drainage of A and B,
1/t + 1/15 = 1/6
t=10
700 meters
Answer:32
3%
1kg = 1000g
30÷1000 × 100 = 0.03×100=3%
Your answer is 4
(52 - 2(2)) / (9 + 3)
(52 - 4) / (9 + 3)
48 / 12 = 4
