Geometry Question

Question

A hot air balloon holds 1,592 cubic meters of helium. The density of helium is 0.1785 kilograms per cubic meter. How many kilograms of helium does the balloon contain, rounded to the nearest tenth of a kilogram?

A. 32.3 kg

B. 284.2 kg

C. 2,043.7 kg

D. 5,435.3 kg

Answer 1

1785/10000 multiply by 1592 divide by o.1785 the answer is 284.172 round to the nearest 10 = 284.2

Answer 2

An analysis of your units can help you determine which approach to take. You are given a volume in m³ and a density in kg/m³. You are looking for a mass in kg. You can see that multiplying the quantity in m³ by the quantity in kg/m³ will cause a cancellation of the m³ and you'll be left with kg as desired.

Alternatively, you can use the formula

density = mass/volume (d = m/v)

and adjust accordingly to solve for the mass m.