Question

I need the answer asap pls! :)

Answer 1

18m

Explanation:

Since the given traingles are similar

We get

`(JK)/(MN) = (KL)/(ML)`

`(JK)/(42) = (21)/(49)`

`JK = (21 * 42)/(49)`

`JK = (3 * 7 * 6 * 7)/(7 * 7)`

`JK = 3 * 6 = 18`

`JK = 18`

Hence the distance across river is 18m