If diagonals of a rhombus are 16 cm and 30 cm. then what is the perimeter (in cm) of the rhombus?

The total cost of 18 pens and 23 pencils is Rs. 231, while the total cost of 7 pens and 13 pencils is Rs. 102. What is the cost of 4 pens and 9 pencils?

The smallest number which when divided by 18, 24, 38 and 42 leaves the remainder 15, 21,     35 and 39 respectively is :-

Twenty women can do work in sixteen days. Sixteen men can complete the same work in fifteen days. The ratio between the capacity of a man and a woman is

Two numbers are respectively 10% and 25% more than a third number. What percent is the first of the second number?

A car reaches its destination in time when moving with an average speed of 45 km/hr. But when it is moving at 30 km/hr, it is late by 10 minutes. Find the total distance of the journey?

If X: Y = 4: 3 and Y: Z = 5: 3. If X+Y+Z = 1584. Find X?

The average of five natural numbers is p. If the next three numbers are included then how much the average of these 8 numbers exceeds than the average p?