Question

Five beans have a mass of 2.1 g. How many beans are in 0.454 kg of beans.

Answer 1

Answer: 1081 beans

Explanation:

It is given : Five beans have a mass of 2.1 g.

It is asked to calculate how many beans are there in 0.454 kg of beans

As we know : 1 kg =1000 g

0.454 kg =$\frac{1000}{1}\times 0.454=454g$

using unitary method:

2.1 g of mass contains = 5 beans

Thus 454 g of mass contains =$\frac{5}{2.1}\times 454=1081 beans$

Thus 0.454 kg of beans contains 1081 beans.

Answer 2

One way to do this:
If 5 beans have a mass of 2.1 gms  then each bean is 2.1 ÷ 5 = .42g
0.454kg is the same as 454 g.  So how many .42 are in 454

454 ÷ .42 ≈  1080.95 beans or 1081 rounded to the nearest bean.