Cost of a dozen pens is ₹180 and cost of 8 ball pens is ₹56. Find the ratio of the cost of a pen to the cost of a ball pen.

Cost of 5 kg wheat is ₹91.50. (a) What will be the cost of 8 kg of wheat ?

Express the following statements as a linear equation in two variables. The cost of a ball pen is 5 less than half the cost of a fountain pen.

Cost of 4 dozen bananas is ₹180. How many bananas can be purchased for ₹90?

If the cost of 7 m of cloth is ₹ 1470, find the cost of 5 m of cloth.

Form the pair of linear equations in the following problems, and find their solutions . 5 pencils and 7 pens cost Rs. 50, whereas 7 pencils 5 pens together cost Rs. 46. Find the cost of one pencil and that of one pen.

A conical tent is 10 m high and the radius of its base is 24 m. Find cost of the canvas requiered to make the tent, if the cost of 1m^(2) canvas is Rs 70.

A conical tent is 10 m high and the radius of its base is 24 m. Find (i) slant height of the tent. (ii) cost of the canvas required to make the tent, if the cost of 1m^(2) canvas is Rs 70.

A dome of a building is in the form of a hemisphere. From inside, it was white-washed at the cost of Rs 498.96. If the cost of white-washing is Rs 2.00 per sq. m. Find the : (i) inside surface area of the dome (ii) volume of the air inside the dome.

Form the pair of linear equations in the following problems and find their solutions graphically. 5 pencils and 7 pens together cost Rs. 50, whereas 7 pencils and 5 pens together cost Rs. 46. Find the cost of one pencil and that of one pen.

From the pair of linear equations in the following and problems, and find their solutions graphically. 5 pencils and 7 pens together cost Rs. 50, whereas 7 penciles and 5 pens toegether cost Rs. 46. Find the cost of one pencil and that of one pen.