Question

it) A car makes 50,000 revolutions to travel a distance of 121 km. The diameter
of the wheel of the car is
(a) 55 cm
(b) 66 cm
(c) 88 cm
(d) 77 cm
Plz solve and answer​

Answer 1

Answer:

Step-by-step explanation:

First we convert km into cm,

⇒ 121 × 100000 = 12100000cm

Now we make the equation. Let diameter be = x,

⇒ 50000 × x = 12100000

⇒ x = 12100000 ÷ 50000

⇒ x = 242cm

Now substitute diameter formula in x,

⇒ 2πr = 242

⇒ 2r = 242 ÷ 3.142

⇒ 2r = 77cm ( 2 times radius is always diameter )

This is the answer. Please mark as brainliest will be highly appreciated :)

Answer 2

answer:d) 77 cm

step by step explanation:

Revolution= 5000

D=121km=12100000km

in 1 revolution distance

12100000÷50000= 242 cm

therefore circumference of whell =

2pi

2×22×7×r= 242

r=242×7/2×22

r= 77/2cm

D=2r

=22×7÷2

=77 cm

thanks