Question

The greatest possible length which can be used to measure exactly the length 7m,3m 85cm and 12m 95cm,is

Answer 1

we should take the HCF

700 = 7 x 2 x 5 x 2 x 5

300 = 3 x 2 x 5 x 2 x 5

85 = 5 x 17

1295 = 5 x 7 x 37

HCF = 5

we need distance of 5 cm to measure all of these