The average price of 3 precious diamond-studded platinum thrones Rs. 106000000. If their prices are in the ratio 4 : 7 : 9. Find the price of the most expensive diamond?

60% boys are failed in History and 65% boys are failed in Geography while total 30% boys are failed in both the subjects. If total 1200 boys appeared in the examination then total how many boys are passed?

A train passes a 100 meters long platform in 28 seconds and a man standing on the platform in 20 seconds. The speed of the train is:

Find the sum of 30²+31²+32²+________+80²

If 1 + sin² A = 3 sin A cos A, then what are the possible values of tan A?

Vimal travels a certain distance at a speed of 80 km/hr. If Sohel travels one third of that distance at a speed of 60 km/hr then at what speed he should travel the remaining distance if total time taken by both Vimal and Sohel was same for the given journey?

Find the value of (cosA - sinA)² + (cosA + sinA)²   -

If apples are bought at the rate of 30 for a rupee. How many apples must be sold for a rupee to gain 20%?