Question

Tineye cycling at the speed of 10 km per hour how long will it take to make a round of a circular field of radius 50 cm take π 3.14

Answer 1

Solutions :-

Given :

Speed of cycle = 10 km/hr
Radius of circular field = 50 cm

Find the circumference of circular field :-

Circumference of a circle = (2πr) unit
= (2 × 3.14 × 50) cm
= 314 cm

Now,
Convert the km into cm and hr into second :-
10 km = 1 hr
10 × 100000 cm = 60 × 60 sec
1000000 cm = 3600 sec

Find the time to cover distance of 1 cm :-

1000000 cm = 3600 sec
1 cm = 3600/1000000 sec

Find the time to cover the distance of 314 cm :-

1 cm = 3600/1000000 sec
314 cm = 3600× 314/ 1000000 = 1.13 sec approx.

Hence,
The cycle take the time of 1.13 sec to make a round of a circular field of radius 50 cm

Answer 2

Here is your answer

Given:-

speed of 10 km per hour.
radius 50 cm .


we have to find circumference of Circle
=>2πr
=>2×3.14×50
=>314cm

convert cm in km into cm

10 km = 1hr
1000000 cm = 3600 sec

Now
we find the time to cover 1 sec
1000000 cm = 3600 sec

$1 \: sec= \: \frac{3600}{1000000} \\ \\ 314 \: sec = \frac{3600}{1000000} \times 314 \\ \\ 314 \: sec = 1.13 \: sec(approx)$

The cycle take time of 1.13 sec to make a round of a circular field of radius 50 cm


hope it helps you