The thickness of a brick is 10 cm. If 15 such bricks are placed one over another to build a wall, the total height of the wall is:
150 cm
100 cm
90 cm
250 cm
Height of wall = 15 x 10 cm = 150 cm
A wall of thickness 10cm and height 5m has to be built across a play ground of length 15m. How many bricks are needed to construct the wall, if each brick has dimensions of 20cm x 10cm x 5cm?