# Civil Engineering - Airport Engineering - Discussion

### Discussion :: Airport Engineering - Section 1 (Q.No.35)

35.

A gradient of + 0.08% is followed by a gradient of - 0.07%. If the permissible rate of change of grade is 0.003 per 30 metres, the length of the transition curve, is

 [A]. 150 m [B]. 140 m [C]. 160 m [D]. 175 m

Explanation:

No answer description available for this question.

 Anna said: (Sep 10, 2015) TC length = (S1-S2)*L1/So. = (0.008+0.007)*30/0.003 = 150 m.

 Sudarshan said: (Nov 8, 2016) How could 0.08% will be 0.008 and 0.07%will be 0.007? It should be 0.0008 and 0.0007. Is it?

 Chhaya said: (May 4, 2017) According to me, the answer is 1500 m (0.08+0.07) * 30/0.003 = 1500 m.

 Jinish said: (Jan 10, 2020) Here gradient is 3% maximum for 30 meter. So it's 0.003. So, answer 0.008+0.007*30/0.003= 150 m.

 Koshy Panicker said: (Sep 7, 2020) The answer is 15m unless its a type in the question. If the gradients are 0.8% and -0.7%, then answer would have been 150m.