IBPS Government Jobs Exams Numerical Ability Trigonometry

A man is watching from the top of a tower a boat speeding away from the tower. The boat makes an angle of depression of 45° with his eye when at a distance of 60 metres from the tower. After 5 seconds, the angle of depression becomes 30°. What is the approximate speed of the boat, assuming that it is running in still water?
A) 36 km/hr B) 32 km/hr C) 38 km/hr D) 40 km/hr E) None of these

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IBPS Other Question
The respective ratio of curved surface area and total surface area of a cylinder is 4:5. If the curved surface area of the cylinder is 1232 cm², what is the height (in cm) ?
A) 14 B) 24 C) 56 D) 28 E) 7 12 Men alone can complete a piece of work in 5 days, whereas 3 men and 9 women together can complete the same piece of work in 10 days. In how many days can 36 women complete the same piece of work?
A) 10 days B) 8 days C) 4 days D) 5 days