Calculate how many days it will take for 7 boys to wash a 35 m long wall if 5 boys can wash a 25 m long wall in 4 days,  Choose the correct choice from the following options.
A) 6 days
B) 3 days
C) 4 days
D) 2 days
E) 5 days

Rationale: "the length of wall painted by one boy in one day = 25 / 5 * 1 / 4 = 1.25 m no . of days required to paint 50 m cloth by 8 boys = 35 / 7 * 1 / 1.25 = 4 days . c"
Answer: C