Rakesh can assemble a cupboard in 20 hours. Tanvi is 25% more efficient than Rakesh. How long will Tanvi take to assemble the same cupboard?

Explanation

1. 01

   25% more efficient: Tanvi does $\frac{5}{4}$ of Rakesh's work per hour.

2. 02

   Time = $20 \div \frac{5}{4} = 20 \times \frac{4}{5} = 16$ hours.