Which of the following is an inert gas group?
Read the given question and decide which of the following statement(s) is/are sufficient to answer the question.
Question:
Which is the lightest box among B1, B2 and B3? Statements:
1. B1 contains packaged food.
2. The weight of B3 is one-fourth of the weight of all the other boxes added together.
Statements 1 and 2 both are sufficient
Statement 2 alone is sufficient.
Statement 1 alone is sufficient
Statements 1 and 2 both are not sufficient.
A porter lifts 20 kg of goods from the ground and places it on his head 2 m above the ground. Calculate the work done by him on the goods. (g = 10 m s-2 is given)