Question

If the time required to construct a wall is 4 hours and 40 minutes, find the time required to construct two such walls.

• A. 7 hours and 50 minutes
• B. 9 hours and 20 minutes
• C. 6 hours and 20 minutes
• D. 10 hours and 10 minutes

Answer 1

The correct option is B 9 hours and 20 minutes

Time required to construct one wall = 4 hours and 40 minutes

Time required to construct two walls = 2 $\times$ Time required to construct one wall

Time required to construct two walls = 8 hours and 80 minutes

We know that 1 hour = 60 minutes
So, 80 minutes = 1 hour and 20 minutes

Hence, time required to construct two walls = 9 hours and 20 minutes