After measuring 120 metres of a rope, it was discovered that the metre rod was 3 cm longer. The true length of the rope measured is:
a) 116m 40 cm
b)121 m 20 cm
c)123 m
d) 123m 60 cm
Pls. explain the answer.
Answer :
Meter rod is 3 cm longer , so , to measure 120 m , our rod is apply by 120 times , So
Total length that is measure by longer part = 120 3 = 360 cm = 3.60 cm ( As we know 1 m = 100 cm )
So,
Actual length of rope = 120 m + 3.6 m = 123 m 60 cm
So,
Option ( D ) ( Ans )
Meter rod is 3 cm longer , so , to measure 120 m , our rod is apply by 120 times , So
Total length that is measure by longer part = 120 3 = 360 cm = 3.60 cm ( As we know 1 m = 100 cm )
So,
Actual length of rope = 120 m + 3.6 m = 123 m 60 cm
So,
Option ( D ) ( Ans )