Question

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

Answer 1

20% of 45 = 45*.2 = 9

What is 20% more than 45?

Answer 2

next step would be multiply 9*60 and that's your answer..

Answer 3

Wrong the correct answer is 3240.Explanation:

A 20 per cent increase on 45 words per minute = 1.2 x 45 = 54 words per minute.
To get words per hour, multiply by 60 = 3240

Answer 4

He's not entirely wrong. The new number is 45 + 9 as we said. Then you multiply by 60...