Question

$252$ students take $3$ hours for decorating the school. If $372$ students together do this work, then this work completes in how much time(in hours)?

Answer 1

It is given that $252$ students take $3hours$ for decorating the school.

We know, more the students together work less the time will be taken to complete the work.

So, it is inverse relation.

We have, $S_1=252,T_1=3hours,S_2=372$

To find: $T_2$

According to inverse relation,

$S_1\times T_1=S_2\times T_2$

$\Rightarrow 252\times 3=372\times T_2$

$\Rightarrow T_2=\frac{252\times 3}{372}$

$\Rightarrow T_2=2.03$

So, Time taken by $372$ students to complete the work $=2hours$ approx.