Question

A does 20 % of less work than B. If A can finish a piece of work in 7½ hours.Then B can can finish it in​

Answer 1

Answer:

6 hours

Step-by-step explanation:

Let the time taken by B = x

Efficiency ∝ 1/Time taken

So, if B is 100% efficient. then A is 80% efficient.

Hence,

$\frac{80}{100} = \frac{x}{15/2}$

x=6 h