If 3 sin x + 5cosx = 5 then what is the value of (3cosx - 5sinx)

When x = 1, then value of |2x – 1| + |x – 3| will be -

The speed of a boat in still water 11 km/hr. It can go 12 km upstream and return downstream to the engine point in 2hr 45min. What is the speed of stream?

The volume of the largest right circular cone that can be cut out of a cube of edge 14 cm.

The daily wages of A & B respectively are Rs. 3.5 & Rs. 2.5. When A finishes a certain work alone, he gets a total wages of Rs. 63. When B does the same work alone, he gets a total wages Rs. 75. If both of them do it together what is the cost of the work?

What is the quantity of water should be added to a 75 litre mixture of milk and water so that the percentage of milk in the mixture decrease from 75% to 45%?

A sector area of 4%   is removed from a circular sheet of paper of diameter 50 cm, If the remaining part is used to make a conical surface , then the ratio of radius and height of the-

A container in the shape of a frustum of a cone having diameters of its two circular faces as 35 cm. and 30 cm and vertical height 14 cm. is completely filled with oil. If each cm3 of oil has mass 1.2g, then find the cost of oil in the container if its costs Rs. 40 per kg.