exam Maths Puzzle Numerical Ability

A load of 12km stretches a spring to 30cm. A load of 15km stretches it to 40cm. What is the function? What is the unstretched length? What load stretches it to 80cm?

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exam Other Question

can you help by finding each quotient:
6 1/4 divided by 2 1/2=
2 1/3 divided by 7/10=

Also can you explain me the process to get the proper answer?

Thank you

Isaias If someone could help me with this probelm I would be very thankful. I should find the area of a circle with radius 4 (and the answer should be in pi), could someone maybe explain how I should solve the problem?