Question

*
120 km/h
The average rainfall over a given place
during the three-year period of 2003-2005
was 65 cm. During the three-year period
2002-2004 the average rainfall was 63 cm.
The actual rainfall during 2005 was 60 cm.
What was the rainfall in 2002?
1. 55 cm
x 60 cm
3. 54 cm
4. 53 cm
​

Answer 1

Answer:

Rain fall in 2002 = 54 cm

Step-by-step explanation:

The average rainfall over a given place  during the three-year period of 2003-2005  was 65 cm. During the three-year period  2002-2004 the average rainfall was 63 cm.  The actual rainfall during 2005 was 60 cm

Average rainfall for 2003-2005 = 65 cm

Total rain fall for 2003-2005 = 65*3 = 195 cm

2005 = 60 cm

2003 & 2004 = 195 - 60 = 135 cm

Average rainfall for 2002-2004 = 63 cm

Total rain fall for 2002-2004 = 63*3 = 189 cm

2002 + 2003 & 2004 = 189

=> 2002 = 189 - 135

=> 2002 = 54 cm

Rain fall in 2002 = 54 cm