Question

A car travels 175 kilometers in 2 hours and 15 mins. What will be its speed?

Answer 1

ᴅɪsᴛᴀɴᴄᴇ = 175000 ᴍᴇᴛʀᴇs

ᴛɪᴍᴇ = 2ʜʀs + 15ᴍɪɴ

= 135 ᴍɪɴ

= (135×60) sᴇᴄᴏɴᴅs

sᴘᴇᴇᴅ = Dɪsᴛᴀᴄᴇ ᴘᴇʀ ᴜɴɪᴛ ᴛɪᴍᴇ

$= \frac{175000}{135 \times 60} \\ \\ = \frac{175000}{8100} \\ \\ = 21.6 \: metre \: per \: second$

ɴᴏᴛᴇ:-

• ᴄᴏɴᴠᴇʀᴛ ᴀʟʟ ᴛʜᴇ ᴠᴀʟᴜᴇs ɪɴ ᴀᴘᴘʀᴏᴘʀɪᴀᴛᴇ ᴜɴɪᴛs.
• 1ᴋᴍ = 1000ᴍᴇᴛʀᴇs

Answer 2

Answer:77.78km/h or 21m/s

Explanation:

disatnce=175 km,

time=2 hour 15 mins  

15/06 hour  = 1/4hour

2 1/4

time = 9/4 hours

speed = disatnce/time

= 175/9/4

=175*4/9

=77.78km/h

or

77.78*5/18

=21.60m/s