# How many days will take

Spinning 3 hours daily, Kanika can spin 2 kg cotton-balls in 12 days. Spinning 4 hours daily, how many days will she take to spin 10 kg cotton balls?

- 45 days
- 42 days
- 38 days
- None of these

**Answer: (1) 45 days**

**Explanation:-**

Kanika takes 3 hours daily for 12 days to spin 2 kg cotton ball.

Then, total time spent by Kanika = 12 x 3

= 36 hours

Therefore, 1 kg cotton ball spinned = 36/2 = 18 hours ……………………….. (1)

Again,

Let Kanika takes daily for X days to spin 10 kg cotton ball

Therefore, total time spent by Kanika to spin 10 kg cotton ball = 4 x X

= 4 X hours

Therefore, 1 kg cotton ball is spinned = 4 X/10 hours ………………………….. (2)

From equation (1) & (2),

18 = 4 X/10

4 X = 18 x 10

X = 18 x 10/4

X = 45 days.

Hence, the correct answer is option (1) 45 days.