Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Mathematics Trigonometry Heights and Distances
If a 30 meter ladder is placed against a 15 metre wall such that it just reaches the top of the wall, the angle of elevation of the wall is:
1
45°
2
30°
3
60°
4
More than one of the above
5
None of the above