A parabolic vertical curve is set out connecting a + 0.7% grade to a -0.6% grade. The chainage and RL of the point of intersection are 1000 m and 250 m respectively. The admissible rate of change of grade is 0.05% per 20 m. The chainage (in m) of the tangent points will be

600 and 1400

No worries! We‘ve got your back. Try BYJU‘S free classes today!

740 and 1260

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

700 and 1300

No worries! We‘ve got your back. Try BYJU‘S free classes today!

650 and 1350

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B 740 and 1260
Length of vertical curve,

$= \frac{0.7 - (- 0.6)}{(0.05 / 20)} = 520 m$

Length of curve on either side of the apex,

$= \frac{520}{2} = 260 m$

Chainage of first tangent point = 1000-260 = 740 m

Chainage of second tangent point = 1000 + 260 = 1260 m

Suggest Corrections

Similar questions

Q. The chainage of the intersection point of two straight lines is 1585.60 m and the angle of intersection is

40^{\circ}

. If the radius of a circular curve is 600 m, the tangent distance (in m) and length of the curve (in m) are -

A parabolic vertical curve is being designed to join a road of grade +5 % with a road of grade -3 %. The length of the vertical curve is 400 m measured along the horizontal. The vertical point of curvature VPC is located on the road of grade +5 %. The difference in height between VPC and vertical point of intersection (VPI) (in m, round of to the nearest integer) is

Q. If the chainage of point of commencement of a circular curve for a normal chord of 20 m is 2002.48 m, the length of first subchord will be

Q. A descending gradient of 4% meets an ascending grade of 1 in 40 where a valley curve of length 200 m is to be formed.The distance of the lowest point on the valley curve from its first tangent point will be

Q. An oil company required 13000, 20000 and 15000 barrels of high grade, medium grade and low grade oil respectively. Refinery A produces 100, 300 and 200 barrels per day of high grade, medium grade and low grade oil respectively. While, refinery B produces 200, 400 and 100 barrels per day of high grade, medium grade and low grade oil respectively. If refinery A costs Rs 400 per day and refinery B costs Rs 300 per day to operate, then the days should each be run to minimize costs, while satisfying requirements are

Join BYJU'S Learning Program

A parabolic vertical curve is set out connecting a + 0.7% grade to a -0.6% grade. The chainage and RL of the point of intersection are 1000 m and 250 m respectively. The admissible rate of change of grade is 0.05% per 20 m. The chainage (in m) of the tangent points will be

The correct option is B 740 and 1260Length of vertical curve, =0.7−(−0.6)(0.05/20)=520 m Length of curve on either side of the apex, =5202=260 m Chainage of first tangent point = 1000-260 = 740 m Chainage of second tangent point = 1000 + 260 = 1260 m

The correct option is B 740 and 1260
Length of vertical curve,

$= \frac{0.7 - (- 0.6)}{(0.05 / 20)} = 520 m$

Length of curve on either side of the apex,

$= \frac{520}{2} = 260 m$

Chainage of first tangent point = 1000-260 = 740 m

Chainage of second tangent point = 1000 + 260 = 1260 m