RVUNL: Mathematics Quiz 2

The average height of 5 boys is 175 cm. A sixth boy joined the group and the average height of all the boys in the group now increased by one centimeter. The height of the sixth boy is:

The monthly income of a person was 13500 and his monthly expenditure was 9000. Next year, his income increased by 14% and his expenditure increased by 7%. The percentage increase in his savings was

A shopkeeper marks his goods 60% above his cost price, but allows 2 successive discounts of 30% and 30%. Then find his profit or loss percentage.

If a sum of money doubles itself in 8 years at simple interest, the rate percent per annum is

A Bus travels at the speed of 36 km/hr, then the distance covered by it in one second is