Answer:
heya! ^^
here , we've been given a right angled triangle along with the measure of two of its sides.
and , we've to find the measure of its third side.
so , we'll be using Pythagoras Theorem to find the measure of the third side.
but first , let's take a look at what Pythagoras Theorem is-
<u>Pythagoras</u><u> </u><u>theorem</u><u> </u><u>states </u><u>that </u><u>the </u><u>squa</u><u>r</u><u>e </u><u>of </u><u>the </u><u>hypotenuse</u><u> </u><u>of </u><u>the </u><u>triangle </u><u>is </u><u>equal </u><u>to </u><u>the </u><u>sum </u><u>of </u><u>squares </u><u>of </u><u>the </u><u>remaining</u><u> </u><u>two </u><u>sides.</u>
according to the figure ,
side AB = hypotenuse = 60 cm
side AC = perpendicular = 48 cm
side BC = base = a
now by using Pythagoras Theorem ,

therefore ,
option ( 4 ) <u>3</u><u>6</u> is correct.
hope helpful :D