Quantitative Aptitude - Arithmetic Ability Questions

The radius of a sphere and hemisphere are same. The ratio of their total surface area is

A man travels 800 km in partly by rail and partly by steamer. He spends 7 hours more time on steamer. If the velocity of the steamer is 20 km/hr and the velocity of rail is 55 km/hr, how much distance does he cover by steamer?

Peter belongs to Town A and Paul belongs to Town B. They start their journeys towards each others towns following the same route at the same time. They meet somewhere on the way and continue with their journeys. After meeting Paul, Peter takes another 13.5 hrs to reach his destination while Paul takes another 6hrs to reach Peter's town. If Peter travelled at the speed of 30 kmph, what was Paul's speed in kmph?

The compound interest earned in two years at 15% per annum is Rs 20640. What is the sum invested (in Rs)?

If √3 = 1.732, then the value of 9+233?

Find measure of central angle of the arc whose length is 22 cm and radius of the circle is 28 cm?

What is the difference (in Rs) between the compound interests on Rs. 4000 for 1 year at 12% per annum compounded yearly and half-yearly?

What is the value of 1+aa1/2+a-1/2-a1/2+a-1/21+a+a-1/2 ?