`t_(1)=(AB)/(v_(b)+v_(R)) . T_(2)=(AB)/(v_(b)-v_(R))` or `v_(b)+v_(R)=(AB)/(t_(1))`
and `v_(b)-v_(R)=(AB)/(t_(2))rArr 2v_(b)=(AB)/(t_(1)+(AB)/(t_(2)))=AB((t_(1)+t_(2))/(t_(1)t_(2)))`
or `((2t_(1)t_(2))/(t_(1)+t_(2)))=(AB)/(v_(b))`= time taken by the boat to cover AB
Group A
Group B
(i) Trade between different countries
Foreign Trade
(ii) Purchase of goods and services from another country
Import Trade
(iii) Export Trade
Selling of goods and services to foreign customer
(iv) Wholesaler
Link between producer and retailer
(v)...
(i) When the trade activities are conduct between two or more countries, it is called as external trade.
(ii) Import trade refers to the purchase of goods and services from foreign country.
(iii) The price charged...