Question

A fan consumes 1 unit electricity in 3 hours. Rahul has 2 fans consumed 21 units this month. For how many hours did he use the fan this month?

Answer 1

1 unit unit in 3 hours

so, 21 units in n 21×3 =63 hours in total he used the fan.

Answer 2

Answer:

$a \: fan \: consumes \: a \: unit \: of \: electricity \: in \: 3hrs \\ 2fan \: consumes \: a \: unit \: of \: electricity \: in \: 1.5hrs = 130m \\ consumption \: of \: 21unit \: of \: electricity \: = 130 \times 21 = 2730 \: hrs \\ hence \: he \: had \: used \: 2730hrs \: throughthe \: whole \: month$ hope this helps your market is the brainliest