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 off to the nearest integer) is

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 off to the nearest integer) is

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