Gurmit can row a certain distance downstream in 5 hours and retum the same distance in 12 hours. If the stream flows at the rate of 4 km per hour, find the speed of Gurmit in still water.

A person, if he walks at the speed of 12 km/h, reaches his office 20 minutes late. Whe» he takes an autorickshaw which covers 120 km in 2 —hours, he 2 reaches his office 265 minutes earlier. Find the distance between his house and his office.

The wages of 16 women amount to Rs 1200 in 15 days. How many men must work for 12 days to receive Rs 3600, the daily wages of a man being double those of a woman ?

If 5 men and 3 boys can reap 23 hectares in 4 days and if 3 men and 2 boys can reap 7 hectares in 2 days, how many boys must assist 7 men in order to reap 45 hectares in 6 days ?

Suman started a business investing Rs 40,000. After 6 monthsAbhinavjoined herwith Rs 25,000. After another six months Swati also joined them with Rs 16,000. The profit earned after 2 years from when Suman started the business should be distributed among Suman, Abhinav and Swati in what ratio ?