Who is credited with creating the first graphical web

If a/b = 3/5, b/c = 4/7 then a:b:c is

Find the LCM of pair of the following polynomials x⁴ – 27a³ x, (x-3a)², whose GCD is (x-3a)

A can do a piece of work in 20 days and B can do it in 30 days. How long will they take to do the work together?

The cost of a machine is ?18,000 and it depreciates at 16(2/3)% annually. Its value after 2 years will be

The breadth of a rectangular field is 60% of its length. If the perimeter of the field is 800 m, what is the area of the field?

The curved surface area of a right circular cone of height 15 cm and base diameter 16 cm is

A machine bought at Rs. 50,000 falls in its value by 8% of its value every year. Find the value of the machine after 2 years.

Find the G.C.D. of the following:

35x⁵ y³ z⁴, 49x² yz³, 14xy² z²