Question

Surabaja has a string of length 3/7 m. Sourish has a string of length 4/21 m. If they join these two strings without any overlap, how long will the new string be?
a) 7/28 m
b) 7/21 m
c) 12/21 m
d)13/21 m

Answer 1

Answer:

Surabaja has a string of length 3/7 m. Sourish has a string of length 4/21 m. If they join these two strings without any overlap, how long will the new string be?

a) 7/28 m

b) 7/21 m

c) 12/21 m

d)13/21 m

→c) 12/21 m

Answer 2

Answer:

The new string will be 13/21 m long.

Step-by-step explanation:

• since two strings have been joined without any overlap thus the resultant string length will simply be the sum of lengths of the two strings joined.
• Thus we get our answer as (3/7)+(4/21)=(9/21)+(4/21)=13/21 m
• if there had been any overlap, we had to subtract the overlapped length of two strings from 13/21 to get a correct answer.