Question

PLEASE GIVE THE SOLUTIONS OF THESE QUESTIONS.
1.IF A:B=3:4 AND B:C=8:9, THEN A:B:C=?
A.8:6:9
B.6:8:9
C.9:8:6
D.3:32:9

the answer is option b.
2. 200m long train runs at the rate of 40 kmph.it will taken ____seconds to pass beside a pole.

a.36
b.180
c.9
d.18
the answer is option d.

Answer 1

1. A:B=3:4=6:8, B:C=8:9 then A:B:C=6:8:9.
2. Speed, s=40(10/36) m/s= 100/9 m/s. Then time taken, t = l/s = 200/(100/9) = 18 s.