Question

1- If 2a, a +10, 3a+2 are in A.P, find value of a
2- A vertical stick 10 cm long cast a shadow 8cm long, at the same time, a tower casts a shadow 30
long. determine the height of tower?​

Answer 1

Answer:

since the terms are in AP. therefore,

=>a+10-2a=3a+2-(a+10).

=> -a+10=2a-8

=> 18=3a

=> a=18/3

=>a=6.