Question

Bala can make a toy in 4 hour and Veena can make it in 3 hours how much time would a date working together to make 105 such toys

Answer 1

they will take 180 hours

Answer 2

$\frac{1}{4 } + \frac{1}{5} = \frac{9}{20}$
$\frac{9}{20} \times 105$