Step 1: Determine the seating arrangement.
- P is right of Q, so Q must be to the left of P.
- T is left of R and right of P, meaning T is between P and R.
- Q is right of S, so S must be to the left of Q.
This means the order of boys from left to right is:
\[
S, Q, P, T, R.
\]
Step 2: Identify the boy in the middle.
The boy in the middle of this arrangement is \( \boxed{R} \).
Final Answer: \[ \boxed{R} \]
Five friends A, B, C, D, and E are sitting in a row facing north, but not necessarily in the same order:
B is to the immediate left of C
E is not at any of the ends
D is to the right of E but not next to C
A is at one of the ends
Who is sitting in the middle?
A weight of $500\,$N is held on a smooth plane inclined at $30^\circ$ to the horizontal by a force $P$ acting at $30^\circ$ to the inclined plane as shown. Then the value of force $P$ is:
A steel wire of $20$ mm diameter is bent into a circular shape of $10$ m radius. If modulus of elasticity of wire is $2\times10^{5}\ \text{N/mm}^2$, then the maximum bending stress induced in wire is: