(iii) d) A pipe can fill a water tank in 1 hour. What part of the tank is filled by the pipe in 20 minutes ? (ii) If the capacity of the tank is 1500 litre, how many litres of water does the pipe fill in 20 minutes ?

1/3 of they tank can be filled in 20 min. and in 20 min, the pipe fills up 500 liters.

Step-by-step explanation:

So 20 minutes is 1/3 of an hour so it makes sense to say that 1/3 of the tank would be filled up in 1/3 of an hour. Next if the pipe can fill up the tank in 1 hr min then we would have to just divide it by 3 to find how much it can do in 20 min. So 1500/3 = 500 liters in 20 min. (Hope this helps)

no

step-by-step explanation:

2-7=-5

7-2=5

when you combing like terms for ech expression, 5 and -5. these numbers are not equal to each other.