Question

a boy is cycling along a square field at the speed of 18 km per hour in how many time he will complete 5 round if the area of square is 9604

Answer 1

ʜᴇʟʟᴏ ᴍᴀᴛᴇ!

ᴀʀᴇᴀ ᴏғ sǫᴜᴀʀᴇ ғɪᴇʟᴅ = 9604 ᴍ²
sɪᴅᴇ = √9694 ᴍ² = 98 ᴍ

ᴘᴇʀɪᴍᴛᴇʀ ᴏғ ᴡʜᴏʟᴇ sǫᴜᴀʀᴇ ɢʀᴏᴜɴᴅ = 98 ᴍ × 4 = 392 ᴍ

ɪɴ ᴏɴᴇ ʀᴏᴜɴᴅ ʜᴇ ʜᴀs ᴛᴏ ᴄᴏᴠᴇʀ 392 ᴍ ᴛʜᴇɴ ɪɴ 5 ʀᴏᴜɴᴅs = 392 ᴍ × 5
= 1960 ᴍ

sᴘᴇᴇᴅ = 18 ᴋᴍ/ʜ
ᴄᴏɴᴠᴇʀᴛɪɴɢ ɪɴᴛᴏ ᴍ/s = 18* 5/18 ᴍ/s
= 5 ᴍ/s

ᴛɪᴍᴇ = ᴅɪsᴛᴀɴᴄᴇ / sᴘᴇᴇᴅ
= 1960 / 5 = 392s

ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs

Answer 2

Your question needs a correction,

Correct area = 9604 m²

×××××××××××××××××××××

Few Formulas,

$a) \: \: side \: \: of \: \: square = \: \: + \sqrt{area} \\ \\ b) \: \: \: perimeter \: \: of \: \: square \: = 4 \times side \\ \\ c) \: \: time \: = \frac{distance}{speed}$

Solution :

=> side of square = +√9604

=> side of square = 98 m²

=> Perimeter of square = 4 × 98

=> Perimeter of square = 392 m

Given that he completes 5 rounds, so

Now, total Distance => ( 5 × 392) = 1920 m

Speed => 18 km/hr

Speed =>18 × 1000/3600 m/s

Speed => 5 m/s

Hence,

$=> time \: \: = \frac{1960}{5}$


Time taken = 392 seconds