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Q.

Read the instructions carefully and choose the correct answer.

A long piece of rope has to be cut into four pieces. Each cut takes you 20 seconds.

Each of those 4 pieces now needs to be cut into two pieces. Each cut takes you the same 20 seconds.

How long will it take to cut the 4 pieces into 8 pieces?

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a

40 seconds.

b

60 seconds.

c

80 seconds.

d

100 seconds.  

answer is B.

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Detailed Solution

Each cut is going to produce 2 pieces.

Each of the 4 pieces needs to be cut once.

So, 4 cuts need to be made which will take= 20+20+20+20= 80 seconds.

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Read the instructions carefully and choose the correct answer.A long piece of rope has to be cut into four pieces. Each cut takes you 20 seconds.Each of those 4 pieces now needs to be cut into two pieces. Each cut takes you the same 20 seconds.How long will it take to cut the 4 pieces into 8 pieces?