Question

A makes 60 chocolate cakes in 20 days and B makes 45 chocolate cakes in 15 days. In how many days will A and B together prepare 24 chocolate cakes?

• A. 15
• B. 4
• C. 6
• D. 24

Answer 1

The correct option is B 4

given that, A prepares 60 chocolate cakes in 20 days
and B prepares 45 choclate cakes in 15 days.

Then, chocolate cakes prepared by A in one day = $\frac{60}{20}=3$

Chocolate cakes prepared by B in one day = $\frac{45}{15}=3$

So, chocolate cakes prepared by A and B together in one day = 3 + 3 = 6

$\therefore$ Number of days required to prepare 24 chocolate cakes = $\frac{24}{6}=4$