Question

Set up an equation in the following situations:
(a) The sum of two consecutive natural
numbers is 23
(b) The 345 students who listed badminton 52
as their favourite sport, were 13 less than
two times the number of students who
listed basketball as their favourite sport.
(c) One-fifth of a number p is 5 less than that
number.​

Answer 1

Answer:

Calculate the electrical energy consumed by a filament lamp of power 100W in 20 minutes.

2000J

12000J

120000J

1000J

The answer to your question is Option C [120000J].

Hey mate after reading your question we come to know one concept tha t is ,

Energy = Power × time .

Here,Energy is product of both the power and time taken .

So,According to Th is concept lets apply it to your question

But one thing that is we should convert time to minutes So,

Time = 20 × 60 = 1200seconds .

Then,Applying it to the formula we get,

Energy = 100W × 12000sec

Energy = 120000J.