Take the total amount of presents as x. Santa will be working at a rate of x/60 presents per minute, and Mrs Claus at a rate of x/40 minutes.
By simply adding the rates together,
x/60 + x/40 = 100x/2400 = x/24,
we can find the answer, 24 minutes.
Take the total amount of presents as x. Santa will be working at a rate of x/60 presents per minute, and Mrs Claus at a rate of x/40 minutes.
By simply adding the rates together,
x/60 + x/40 = 100x/2400 = x/24,
we can find the answer, 24 minutes.