yes they will work no problem...if u r staying at Hotel...ask them to provide u with socket adapter to fit in power supply...or u can buy one costing Rs 150/- from Pakistan to carry along with yourself
some laptop come with separate power cords to adapter according to US/UK standards
BTW almost all adapters / chargers support 100-240 Volts to accommodate both 110 volts and 220 volt environments.
you can verify by reading the power input requirements printed on charger adapter itself