Question

what is the length whoose 30% is 24cm

Answer 1

Let that length= x

Now ,
According to the Question :

30% of x is 24 cm

$\frac{30}{100} \times x = 24 \\ \frac{3}{10} \times x = 24 \\ x = 24 \times \frac{10}{3} \\ x = 8 \times 10 \\ = 80$

The required value of x is 80 .

Answer 2

Let x be length
x of 30 percent
= x×30/100 = 24
= 3x= 240
= x= 80