Q. 15 A4

# Two rods of 13m. length and 7m. length are situated perpendicularly on the ground and the distance between their foots is 8m. The distance between their top parts isA. 9m.B. 10m.C. 11m.C. 12m.

The situation can be depicted by figure given below:

Here AD and BC are two rods.

Distance between top CD can be given by Pythagoras theorem.

By applying Pythagoras theorem in ΔCED, we get,

h2 = p2 + b2

CD2 = 62 + 82

CD2 = 36 + 64

CD2 = 100

CD = √100 = 10 cm

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