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Let the speed of boy in still water be X km/h. And the speed of current = 10 km/h Downstream speed = (X + 10) km/h Upstream speed = (X – 10) km/h Let time be ‘t’ hours. ⇒ [(X + 10) t]/6 = (X – 10) t ⇒ X + 10 = 6X – 60 ⇒ X = 14 km/h Downstream speed = 14 + 10 = 24 km/h Upstream speed = 14 – 10 = 4 km/h
If the average number of unsold items by company 'B' and 'D', together, who were presented in a competition is 'a', then find the value of 90% of 'a'.
Find the average number of chocolates distributed in class IV, V and VI together.
What is the total number of male employees in the company?
What is the difference between the total number of people who visited cinema hall C and the number of men and children who visited cinema hall A?
What is the difference between the cost of fencing of R and that of Q?
What is the difference between the number of Umbrella sold in city B and the number of Raincoat sold in city A?