Quantitative Aptitude - Arithmetic Ability Questions

Find the curved surface area (in cm²) of a hemisphere of diameter 28 cm

Rs. 750 invested for 3 months gave an interest of Rs. 18. What was the simple rate of interest per annum?

In a class of 60 students there are 30 girls. The average weight of these girls is 58 Kg and average weight of the full class is 63 kgs. What is the average weight of the boys of the class?

The volume of a spherical balloon is increased by 700%. What is the percentage increase in its surface area?

A train, 200 m long, is running at a speed of 54 km/hr. The time in seconds that will be taken by train to cross a 175 m long bridge is

A shopkeeper marks his goods 50% more than the cost price and allows a discount of 25%. His profit or loss percentage is:

A man is running at the speed of 20 km/hr. What is time (in seconds) taken by man to cover one round of a circular garden of radius 350 metres?

A milk merchant buys 50 litres of milk at the rate of Rs 40 per litre and mixes 5 litres of water in it. If he sells this mixture at the rate of Rs 42 per litre, then what is the profit percentage for the dealer?