Question

Hamanth reads 1/3 of a book in 1hour what part of a book willhe have in 2 1/3

Answer 1

Here is your answer:

Hamanth read $\frac{1}{3}$ book in = 1 hour

he read 1 book in = $\frac{3}{1}$ hour

so.....
he will read 21/3 book in

= 3× $\frac{21}{3}$

$\boxed{=21 hours}$

:)