1.

An copper wire is sold only in multiple of 7 m and a man requires sever length of wire, each 1 m 70 cm long. To avoid any wastage, he should purchase minimum length of : 1). 119 m2). 11.9 m3). 170 m4). 185 m

Answer»

To avoid any wastage MINIMUM length that MUST be PURCHASED would be equal to the least COMMON FACTOR of 7 m and 1 m 70 cm

7 m = 700 cm

And 1 m 70 cm = 170 cm

LCM of 700 and 170 = 11900 cm

11900 cm = 119 m

∴ To avoid any wastage, he should purchase minimum length of 119 m.


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