Question

Find $2\times \frac{22}{7}\times 0.35(0.35+1.25)$.Write the first number after decimal.

Answer 1

$2\times \frac{22}{7}\times 0.35(0.35+1.25)=2\times \frac{22}{7}\times \frac{7}{20}\left(1.6\right)=2\times \frac{22}{7}\times \frac{7}{20}\times \frac{16}{10}=\frac{352}{100}=3.52$ $.$