Question

Class - 7
maths
two poles of heights 9m and 14m high, stand upright on a plane ground. if the distance between their feet is 12m. find the distance between their tops.

Answer 1

Answer:

Draw a diagram, 9m pole on the left then 14m pole on the right.

let AB be pole of 9m where A is the top then 2nd pole be CD where D is the top.

join AD and also AE where is is a point on 2nd pole at 9m

AE is a straight line

Notice right angles triangle ADE right angled at E.

Step-by-step explanation:

AE=BC=12m

Applying Pythagoras theorem

AE^2+DE^2=AD^2

144+25=AD^2

AD= ROOT[169]

AD=13m