The sum of length, breadth and height of a cuboid is 25 cm. The length of its diagonal is 15 cm. Find the total surface area of the cuboid.

200 litres of mixture contains 15% water and the rest is milk. The  amount of milk that must be added so that the resulting mixture contains 87.5 % milk is:

A loss of 19% gets converted into a profit of 17% when the selling price is increased by Rs. 162. The cost price of the article is 

The cost price of an article is 480. If it is to be sold at a profit of 6.25 %, how much would be its selling price? 

Two towns A and B are 170 km apart, a train starts at 9 a.m. from A towards B at a speed of 40 km/hr, at 11 a.m. another train starts from B towards A at a speed of 50 km/hr. When will the two trains meet?

A tourist spends daily as many rupees as the number of days of his total tour. If his total expenses were ₹ 361, then how many days did his tour last? 

By selling a pen for Rs 105 there is a loss of 30%. At what price (in Rs) the pen must be sold in order to gain 30%?