Question

Q3.
Solve the following questions:-
(i)
A student runs around a circular ground with diameter 42m. How much distance he will
covers in 7 rounds.
Ans.​

Answer 1

Answer:

if diameter is 42cm then radius = d/2 = 42cm / 2 = 21cm

runs around means it comes under the concept of circumference

so, circumference of circle = 2πr

= 2 × 22 / 7 × 21

= 2 × 22 × 3 = 132cm

distance covered in 7 rounds6= 132cm × 7 = 924cm

Answer 2

Answer:

diameter=42 than

radius =42÷2=21

circumference of circle is =2πr

2×22÷7×21=132

and he will covered in 7 rounds=924

924 is the ans