Question

From a rope 31/2 m long three pieces of length 7/5m , 8/3m and 41/9 m are cut off what is the length of the remaining rope.
WRONG ANSWER WILL BE REPORTED​

Answer 1

A; from 31/2m long rope is there

the three pieces are left

then 7/5,8/3,41/9

the Lcm of 5,3,9=45

7*9+8*15+41*5/45

63+120+205/45

388/45m

31/2-388/45

the Lcm of 45,2 is 90

31*45-388*2/90

1395-776/90

619/90

6.8

then 68/10 is present