Question

In a hostel, there are $40$ boys. They have provision for $30$ days.$20$ more boys joined the hostel .how long will the provision last now?

Answer 1

Let the provision will last for $x$ days.

Then, according to the question,

$40\times 30=60\times x$

$x=\frac{40\times 30}{60}$

$x=20$

Hence, the provision will last for $20$ day.