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cos 3x = 1/2, cos π/3 = ½ so 3x = 2nπ ± π/3 Thus, x = 2nπ/3 ± π/9 Correct option: a
A person travels 240 km partly by car and partly by train. He spends 2 hours more traveling by train than by car. The speed of the car is 60 km/h, and t...
Buses A and B are moving around a circular ground of radius 350 m. If the speeds of the buses A and B are 15 m/sec and 20 m/sec respectively, then what ...
500 metres long train crosses a man who is moving in the same direction with a certain speed, in 50 seconds. If the same train can cross a tree in 20 se...
If a car runs at 40 km/hr, it reaches its destination late by 14 minutes but if runs at 50 km/hr it is late by 8 minutes. What is the correct time for t...
‘I’ and ‘J’ started moving towards each other at the same time with a speed of 35 km/hr and 25 km/hr, respectively. If the distance covered by â...
A train moving at 3/5th of its normal speed reaches its destination 10 hours late. Find the normal time taken by it.
If a person walks 20% more than of his usual speed, reaches his distance 90 minutes before. If the destination is 459 km away, then the usual speed of a...
A boy goes to school at 7 km/Hr and return at a speed of 6 km/hr. If he takes 13 hrs in all. Find the distance from his village to school?
A train covers a distance of 77 km at the speed of 35 km/h the next 63 km distance covers with a speed of 42 km/h and last 24 km with the speed of 80 km...
A train 150 meters long crosses a man running in the same direction at a speed of 9 km/h in 15 seconds. It then crosses a platform in 25 seconds. Find t...
