C :: Calculate Different Measurements For A Cylinder - Width Modifier For End User Input

I have created a program to calculate different measurements for a cylinder. Anyways, the end user has to input 3 variables.

Enter the lower radius: 6
Enter the upper radius: 5
Enter slant height: 2.236

The numbers are what "End User" would input. But I need to make it look like this when said "End User inputs the numbers.

Enter the lower radius: 6
Enter the upper radius: 5
Enter slant height: 2.236

Here is what I have for it, but I don't know what to put where.

printf("
Enter the lower radius: ");
scanf("%f", &lower_rad);
printf("Enter the upper radius: ");
scanf("%f", &upper_rad);
printf("Enter slant height: ");
scanf("%f", &slant_h);