Reshma covers 45 km at a speed of 15 km/h by bicycle, 80 km at a speed of 40 km/h by car, and another 6 km at a speed of 2 km/h on foot. Find her average speed for the whole journey (correct to 2 decimal places).

A can do a work in 6 days and B can do the same work in 12 days. If A, B and C together can do the same work in 4 days, then in how much days C can do it alone?

If $$ {0.7\over 1-6c}=-0.2$$ then what is the value of c.

If one number is 50 percent less than X and the other numbers are 20 percent less than X. What is the ratio of both the numbers?

Direction: The given Bar Graph Presents the number of different types of vehicles (in lakhs) exported by a company during 2014 and 2015.

Which type of vehicle showed a 32% increase in export in 2015 as compared to that in the previous year? 

Simplify : $$ {5\over3}×{7\over51}\ of \ {17\over5}-{1\over3}\over {2\over9}×{5\over7}\ of \ {28\over5}-{2\over3}  $$

15% of 45% of a number is 105.3 What is 24% of that number?

What is the value of $${\sqrt{1-cosA\over{1+cosA}}}$$?