If the simplest form of  $240\%$ in a ratio is $\mathrm{m}:\mathrm{n}$, then find the value of $\mathrm{m}+\mathrm{n}.$

Kamal can build a 6 foot high wall in 24 days and Karan can build the same wall in 22 days. In how many days will they together build the same wall?

(A)$\frac{23}{264}days$

(B)$\frac{246}{23}days$

(C)$\frac{264}{23}days$

(D)$\frac{23}{246}days$

Kamal can build a 6 foot high wall in 7 hours. Abi can build the same wall in 13 hours. If they work together, in what time will the same wall be built?

(A)$\frac{89}{20} hours$

(B)$\frac{20}{91}hours$

(C)$\frac{91}{20}hours$

(D)$\frac{20}{89}hours$

G is twice as fast as S in doing work. If G can do a work in $30$ days less than S, how many days will they take to complete the work together? 

1.$25$
2. $20$
3. $22$
4.$15$