Question

Calculate the units if an electric bulb of 40watt and a fan of 30 watt is used for 6 hours perday
anser me​

Answer 1

Given:-

• Power of bulb = 40 W
• Power of fan = 30 W
• time period = 6 hours

To find:-

• Total unit

Formula:-

$\underline{\boxed{\sf Energy = power × time}}$

Note:- power should be in KW with respect to hours.

Solution:-

• 1 W = $\sf\dfrac{1}{1000}$ KW

• 40 W = $\sf\dfrac{40}{1000}$ KW

• 40 W = 0.04 KW

• Similarly, 30 W = 0.03 KW

Total power = 0.04+0.03 = 0.07 KW

Energy = 0.07 × 6 = 0.42 units

hence, the amount of 0.42 units is consumed.