Question

Distance covered in one revolution
20
[
=frac{11 times 1000 times 100}{5000}=220 mathrm{cm}
]
circumference of the wheel ( =220 mathrm{cm} ) The diameter be ' ( d ) ' Let the
[
pi d=220
]
Then,
[
frac{22}{7} times d=220
]
( Rightarrow )
[
d=frac{220 times 7}{22}=70 mathrm{cm}
]

# 20. A bicycle wheel makes 5000 revolutions in moving 11 km. The diameter of the wheel is (1) 50 cm (2) 60 cm (3) 70 cm (4) 80 cm

Solution