It would take 6

hours or 6.25 hours if John uses the 100 watt pump.
If you want the ratio then its 7:13
hope this helps you
Step-by-step explanation:
18×RM 8= RM 144
13× RM 11=RM 143
RM 144+143= RM 287
are u Malaysian too? coz I'm one hehe
The answer is:
x=-8
Because:
If you pick a number(-8) to fill in the equation written below
5x+20+5x=5x-20
After applying the -8 to x you get
-40+20-40=-40-20
When you simply the both sides you get
-60=-60
And that’s right -60 is equal to -60!