Answers

2015-10-29T20:03:40+05:30
Radius of wheel = diameter/2 = 49/2 cm
Circumference = 2πr = 2 × 22/7 × 49/2 = 154 cm 
Distance = 154 m = 15400 cm
No. of revolutions = 15400 cm / 154 cm = 100.

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2015-10-29T20:07:59+05:30
D=49cm
r=49/2 cm
distance travelled in one revolution=2πr
=2*(22/7)*(49/2)
=154cm

Total distance travelled=154m=15400cm

So. number of revolutions =15400/154
=100
so it takes 100 revolutions
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