1 Chose the best answer to indicate the volume of the follow

1. Chose the best answer to indicate the volume of the following. An air in a balloon with a diameter of about 17 meters.

            a)         2600 m³          b)         2600 cm³        c)         2600 km³

2. Kim Martello has purchased a farm that is in the shape of a rectangle. The dimensions of the piece of land are 1.4 km by 3.75 km.

a)         How many square kilometers of land did she purchase?

b)         If 1 km²equals 100 ha, determine the amount of land she purchased in hectares.

Solution

1. Volume= (4/3)*pi*r^3= 2572 m^3 = 2600 m^3

answer is A

2.

a) area= 1.4^3.75= 5.25 Km^2

b) 5.25 Km^2 = 5.25*100ha= 525 ha