Answer:
the answer is 18
Step-by-step explanation:
26×4=104
292-104=188
26÷2=13
188-13=175cm
the tree was 175cm when he moved in
30/75 = 12/x
30*x=75*12
30x=900/:30
x=30
Inlet pipe can fill the pool in 6 hours, means: every hour the pool is filled 1/6
a drain can empty the pool in 9 hours, means: every hour the pool is drained 1/9
If the inlet and the drain are both left open, every hour the pool is filled 1/6-1/9=1/18
It will take 18 hours to fill up the pool.
Answer:
4 1/2 hours
Step-by-step explanation:
Total time worked was ...
2 3/4 + 1 3/4 = (2 +1) + (3/4 +3/4)
= 3 + (1 1/2) = 4 1/2 . . . hours
