Question

At noon, the shadow of a flagpole is 10 feet long. At the same time, the shadow of a 140-foot tall building is 60 feet long. What is the height of the flagpole? Round your answer to the nearest foot.

Answer 1

10=2x5
60=2x2x3x5

2x2x5x3=60

i think to do this you need lcm but im not sure