a fan consumes 1 unit of electricity in 3 hours Rahul has two fans which consumed 21 units this month for how many hours did he use the fans this month
21 u * 3hr/1u = 63 hr
or, as a proportion,
x/21 = 3/1
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Math
To find out how many hours Rahul used the fans this month, we need to divide the total units of electricity consumed by the two fans by the rate of consumption per unit.
Given that a fan consumes 1 unit of electricity in 3 hours, we can set up the following equation:
Total units consumed by the two fans = Rate of consumption per unit x Total hours used.
Let's solve for the total hours used:
Total hours used = Total units consumed by the two fans / Rate of consumption per unit.
In this case, the total units consumed by the two fans are 21 units, and the rate of consumption per unit is 3 hours.
Total hours used = 21 units / 3 hours = 7 hours.
Therefore, Rahul used the fans for a total of 7 hours this month.