प्रकाश परावर्तन तथा अपवर्तन - L15 | NCERT प्रश्न अभ्यास | CLASS 10 - विज्ञान | 12PM | Amba Ma'am

12 PM Special Class | Class 11 - STRUCTURE OF ATOM || BOHR MODEL By Yakshu Ma'am

A man cycles with a speed of 10 kmph and reaches his office at 1 p.m. However, when he cycles with a speed of 15 kmph, he reaches his office at 11 a.m. At what speed should he cycle so that he reaches his office at 12 noon ?