Question

What is the maximum number of cups of coffee that can be served?

The water tank of a coffee maker is shown below. She infuses 350 ml cups.

Answer 1

9 cups

Explanation:

The volume is V=w×L×h, where L=0.21m, w=0.05m and h=0.3m

V=0.21×0.05×0.3=63×5×10^(-5)m³

V=315×10^(-5)m³=3.15dm³=3.15liters

This is because 1dm³=1l (by definition)

The volume of a cup: u=350ml

Number of caps n=V/u=3.15l/350ml

n=3150/350=9cups

Answer 2

9 cups

Explanation:

1 m³ = 10⁶ ml

0.21×0.05×0.3 = 0.00315 m³ × 10⁶

= 3150 ml

No. of cups: 3150 ÷ 350 = 9