4

# A can do a certain job in 25 days which B alone can do in 20 days. A started the work and was joined by B after 10 days. The number of days taken in completing the wotk were ?

$13\frac{2}{3}kmph$

$14\frac{2}{3}kmph$

$15\frac{2}{3}kmph$

$16\frac{2}{3}kmph$

Please do not use chat terms. Example: avoid using "grt" instead of "great".