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Q.

A typist can type 45 words per minute. He increases his speed by 20 percent. How many words can he now type per hour?


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a

3210

b

3240

c

3270

d

3300 

answer is B.

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Detailed Solution

Concept- The new typist can type 54 words per minute, then we will add 45 with 20% of 45 and then finally we will calculate the speed of the typist per hour.
Speed of the typist =45 wordsmin
If his speed increases by 20%, then his speed Question ImageQuestion Imagewordsmin
∴ Speed per hour Question Imagewordshr
Hence,the correct answer is option 2.
 
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