4 members of a family decide to go to a party. The location is at a certain distance from there house. It starts raining when they depart.
They have only one umbrella with them that can accommodate 2 of the family members at a time. So they decide to go there in of sets of 2 with one of them returning to take others to the place.
The 4 members A, B, C and D take 1, 2 , 5, and 10 minutes respectively to reach there.
Calculate the minimum time taken by all the family members to reach there.
Note: They can follow any sequence while going to the party.