Ch 7 Variation
0:7 The table shows the distance travelled by a car an the
time taken for it .
Time (in hrs) (y) 2 3
5.
Distan(km) (x)/ 90
180 225
Identify the variation and find the value of x and y
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Given : the distance travelled by a car and the time taken for it.
Time (in hrs) (y) 2 3 y 5
Distance (KM) (x) 90 x 180 225
To Find : Identify the variation and find the value of x & y.
Solution:
90/2 = 225/5 = 45
Hence Distance ∝ Time
Distance = 45 ( Time)
45 is the constant of variation / Speed (45 km/hr)
x = 45(3) = 135 km
180 = 45 y
=> y = 4 hrs
Direct Variation
x = 135 km
y = 4 hrs
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