In any triangle ABC, AB + BC = 12 cm, BC + CA = 14 cm and CA + AB = 18 cm. What will be length of radius of a circle, if the perimeter of circle is equal to the perimeter of triangle ABC? 

The average weight of 15 students of a class increases by 1.5 kg when a student of 40 kg is replaced by a new student. What is the weight (in kg) of the new student?

Solve it $$ {sin \ θ\over 1+cos\ θ}+{1+cosθ\over sin\ θ}=?$$

The least number that should be added to 2,397 so that the sum is exactly divisible by 3, 4, 5 and 6 ?

B walks at a speed of 9 km/h and after 9 hours of its start, C follows him on his cycle at a speed of 18 km/h. At what distance from the starting point will C catch B?

A person completes a journey of 30 km at a speed of 6 km / h and a journey of the remaining 40 km at a speed of 8 km / h. What is his average speed of travel for the entire journey?

If $$ {y\over {x-3}}={y+x\over 3}={x\over y}$$ then 3 : y : x equal to :

Direction: The following table shows the number of students of 7 colleges A, B, C, D, E, F, G participating in extra-curricular activities :

The ratio of total number of students in activity II and I is ?