Question

if an electrical bulb of 40 watt and a fan of 30 watt is use for 6 hours perday. Calculate the units

give me step by step sol​

Answer 1

Answer:

0.42 units

Explanation:

total electricity consumed in a day( in watts)=6×(40+30)watts=420watts-hour

1 units=1kwh=watts-hour/1000

420/1000kwh=0.42kwh=0.42units

Answer 2

Answer:

0.42units/day

Explanation:

Given,

• Bulb consumes = 40watts/hr
• Fan consumes = 30watts/hr
• Time = 6hrs/day

To find,

• No of units burnt in a day

Solution :-

• Total watts for one hr = 40 + 30
• Total = 70/hr
• For six hours = 6 x 70
• Total = 420watts

Now convert the watts into units :-

if,

• 1 unit = 1kilowatt
• 1 unit = 1000watts

Then,

• 420watts = 420/1000 units
• 420watts = 0.42units

Hope it helps