Question

plz help me solve this sum with steps

Answer 1

Let the total length be 1, so part of lamp post above water

= 1 - 1/2 - 1/3

= 6/6 - 3/6 - 2/6

= 1/6

total length of the lamp post x, let

so, x/2 + x/3 + 3(1/3) = x

x/2 + x/3 + 10/3 = x

x - x/2 - x/3 = 10/3

taking lcm 6

(6x - 3x - 2x) / 6 = 10/3

x/6 = 10/3

x = 60/3 = 20m

length of the pole is 20m