Question:
Mark (✓) against the correct answer:
Rashmi types 510 words in half an hour. How many words would she type in 10 minutes?
(a) 85
(b) 150
(c) 170
(d) 153
Solution:
(c) 170 words
Let x be the number of words typed by Rashmi in 10 minutes.
Less time will be taken to type less number of words.
So, it is a case of direct variation.
Now, $\frac{510}{30}=\frac{x}{10}$
$\Rightarrow x=170$
∴ Rashmi will type 170 words in 10 minutes.