Question

The diameter of the wheel of a car is 77cm.How many revolution will it make to travel 121 km

Answer 1

Hey mate!!!!!

First we should take out the circumference
Circumference = 2πr or πd
so assuming π as 22/7 we have
circumference =
$\frac{22}{7} \times 77 = 242$
242 cm

Now since the circumference is in cm we should convert the distance also in cm.


Given distance 121km

1km = 1,00,000cm

121km = 1,21,00,000cm

Now to find out the revolution, we have to divide the distance by circumference

So distance=
$12100000 \div 242 = 50000$
50,000

So the wheel should complete 50,000 revolution.


Hope it helps dear friend ☺️✌️✌️

Answer 2

Answer:

diameter of the wheel =77cm

=77/100000 km =0.00077 km

the circumference of the wheel =2×22/7×r

=22/7

=22/7×0.00077

=0.00242 m

the distance travelled by the car =121km

the number of revolution the wheel will take to travel 121km=121/0.00242

=50000