i am moving with a speed of 3 kmph and a car is slowly driven in a road full of fog. i see the car for 4 min and it travelled a distance of 100m. then the speed of the car is( in km/h)
a. 3
b. 4 + 1/2
c. 5+3/4
d 2+1/2
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answer is 3/2=1.5km/hr
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