Question

1) In a plane, $90\%$ of the seats are filled, $30$ seats are empty. Find the number of seats on the plane.

2)Anchals height increased by $4\%$ this year. The increase in height is $5cm$. How tall is she this year?

Answer 1

$10$% seats are $30$

$100$% are $30\times 10=300$

$\therefore$ Total no. of seats are $300$

$4$% of Aanchal's height $=5㎝$

$100$%=?

$\frac{4}{100}\times x=5$

$x=?$

$x=\frac{100\times 5}{4}=25\times 5=125㎝$

$\therefore$Height of Aanchal$=125㎝$