Vinod types 540 letters in half an hour, then how many letters will be typed in 6 minutes?
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Vinod types 540 letters in half an hour, then how many letters will be typed in 6 minutes?

(a) 108

(b) 240

(c) 270

(d) 90
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Solution : 

$:$ Vinod types the letters in 30 minutes $=540$.

$\therefore \quad$ Vinod types the letters in 1 minute $=\frac{540}{30}$.

$\therefore$ Vinod types the letters in 6 minutes $=\frac{540 \times 6}{30}$

$=108$ letters: Ans.

$\therefore$ Correct option is (a)

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