Question

A can do a piece of work in 4 days and B can do the same work in 5 days. Find, how much work can be done by them working together in : (i) one day (ii) 2 days. What part of work will be left, after they have worked together for 2 days ?​

Answer 1

Answer:

Sometimes people make prejudiced comments in our presence. We are often not in a position to do anything about this because it is difficult to say something right then and there. Divide the class into groups and each group discuss what they could do in one of the following situations:

a. A friend begins to tease a classmate because he is poor. b. You are watching TV with your family and one of them makes a prejudicial comment about a particular religious community.

c. Children in your class refuse to share their food with a particular person because they think she is dirty. d. Someone tells you a joke that makes fun of a community

because of their accent.

e. Some boys make remarks about girls not being able to play games as well as them.Go through Part-1 carefully, and make a list of as many words as you can find that indicate movement of different kinds. (There is one word that occurs repeatedly-count how many times!) Put them into three categories.

fast movement slow movement neither slow nor fast

Can you explain why there are many words in one column and not in the

others?

Fill in the blanks in the sentences below (the verbs given in brackets will give you a clue).

Answer 2

Answer:

A can do a piece of work in 4 days  

And B can do the same work in 5 days  

∴ A’s one day’s work = $\frac{1}{4}$

And B’s one day’s work = $\frac{1}{5}$

(i) A and B’s both one day’s work = $\frac{1}{4}$ + $\frac{1}{5}$ = $\frac{5 + 4}{20}$ = $\frac{9}{20}$

(ii) a and B’s 2 day’s work = $\frac{9}{20}$ × 2 = $\frac{9}{10}$

∴ work left after 2 days = 1 - $\frac{9}{10}$ = $\frac{10-9}{10}$ = $\frac{1}{10}$

 

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