Question

A boat takes 2 hrs to travel 8 km and back in still water lake. with water velocity of 4km/h the time taken for going upstream of 8 km and coming back is

Answer 1

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♻ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ♻
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ᴛɪᴍᴇ = ᴅɪꜱᴛᴀɴᴄᴇ/ᴠᴇʟᴏᴄɪᴛʏ

➡ᴡʜᴇɴ ɪɴ ᴛʜᴇ ᴅɪʀᴇᴄᴛɪᴏɴ ᴏғ ᴄᴜʀʀᴇɴᴛ ᴠᴇʟᴏᴄɪᴛʏ
=> 8 + 4= 12
ᴛ1=> 8 / 12 = 2/3 ʜʀꜱ

➡ᴡʜᴇɴ ᴀɢᴀɪɴꜱᴛ ᴛʜᴇ ᴄᴜʀʀᴇɴᴛ ᴠᴇʟᴏᴄɪᴛʏ
=> 8 - 4 = 4 
ᴛ2= 8 / 4 = 2 ʜʀꜱ

➡ᴛᴏᴛᴀʟ ᴛɪᴍᴇ => 2 + 2/3 = 8/3 ʜʀꜱ
=> 2 ʜʀꜱ & 40 ᴍɪɴ...Aɴꜱ..✔