Question

A science teacher has 0.4 liter of seawater. She gives each of her 22 students a container and a 5 millimeter spoon. She then ask her students to put two spoonfuls of seawater into their container. How many milliliters of seawater will be left after all 22 students have filled their containers?

Answer 1

0.4L is 400 milliliters and the spoon is 0.5ml so 0.5x2 which is 1 an dthere are 22 people so 400-22 is 378ml so the container had 378ml/3.78L

Answer 2

General Idea:

We need to convert the liter to milliliter to find out how much the science teach has in ml.

$1L=1000\;mL\\\\0.4L=0.4 \times 1000\;mL=400\;mL$

Capacity of a Spoon given below:

$1 \; spoonful\; = 5 \; mL$

Each student asked to fill 2 spoonful, which means 10 mL of seawater is expected to be filled in their container.

$Amount \; of\; seawater\; filled\; by\; 22\; students=\\\\ Number \; of \; students \times Amount \; of \; seawater \; filled \; by \; each \; student \; in \; their \; container\\\\= 22 \times 10\; mL=220\;mL$

Conclusion:

Number of milliliters of seawater that will be left after all 22 students have filled their container is given below:

$400 \; mL \; - \;220 \; mL=180 \; mL$