Hi Bhagyashree,
You can try this sample JS code that redraws / resizes the first Chart in your page:
Highcharts.charts[0].setSize(<your width>, <your height>, <do animation - True or False>);
An example of this call would be:
Highcharts.charts[0].setSize(450, 450, true);
This will only apply the resizing to the first chart in the screen. If you have more than one Chart in the same page, you should get it by id to make sure you resize the right one or you want to do a for each to resize all the charts inside Highcharts element.
You can see more information about the SetSize function here.
Hope it helps.
Regards,
João