Respuesta :
after 20 days , ants will be double so 60 ants
again after 20 days, there will be 120 ants
and at last
after total of 60 days, ants will be 240 in number ! .....answer !
again after 20 days, there will be 120 ants
and at last
after total of 60 days, ants will be 240 in number ! .....answer !