Question

5.
A boy is cycling along a square field at the speed of 18
km/hr. In how much time will he complete 5 rounds if
the area of square field is 9604 m'?
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Answer 1

Answer-: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

Answer 2

Answer:

     time = 382 seconds

Step-by-step explanation:

Area of the square = side² = 9604 m²

side² = 9604 m²

side = √9604 m²

side = 98 m

perimeter of square = 4 × 98m = 382m

total distance travelled = 5 × 382 = 1910m

speed = 18 km/hr = 18 × 5 / 18 m/s = 5m/s

time = distance / speed

time = 1910 / 5