For the following questions answer them individually
A train runs at a speed of 90 km/h in the first 10 minutes and 60 km/h in next 25 minutes and 15 km/h in last 4 minutes. What is the average speed of the train?
If 125 identical small spheres are made from a solid sphere of diameter 15 cm, then what is the surface area of each of the small sphere?
A salesman buys 15 articles for Rs.10 and sells 10 articles for Rs.15. Determine the percentage profit earned by the salesman.
Sohan and Rohan together can do a piece of work in 18 days. If Sohan alone can do the same work in 27 days, then how many days Rohan alone takes to complete the same work?
The value of the following expression is:
$$197 - [\frac{1}{9} \left\{42 + (56 - 8 + 9)\right\} + 108]$$
A, B, and C can do a piece of work in 8, 4, and 16 days respectively. How many days will A take to complete the entire work if A is assisted by B and C both on every second day?
In an election between two candidates, One candidate got 48% of the total valid votes.
18% of the votes were invalid. If the total number of votes was 17500, then what was the number of valid votes the other candidate got?