Base of the prism is right-angled triangle having base and altitude as 10 cm and 24 cm respectively.
Third side of the triangle will be equal to
√102+242=√676=26 cm [1 mark]
Lateral surface area will be the area of three rectangles formed.
Area = 10×30+24×30+26×30
=30(10+24+26)
=30×60
=1,800 cm2 [1 mark]