The heights of Manish and Nitish were in the ratio 5 ∶ 6. After some years Manish's height increased by 20% but it was only 90% as much as Nitish's height at that time, as Nitish's height increased by 20 cm. What is the new height of Manish?
1
168 cm
2
186 cm
3
180 cm
4
174 cm