What is the advantage of transplanting saplings from a nursery instead of sowing seeds directly into the soil in the case of paddy and vegetable crops?

The crop cultivated by sowing seeds directly into the soil is

Vinod went to his ancestral village alongwith his father during the summer holydays. He found that women of the village still used dried cow-dung cakes (uple) as the fuel to cook food and for other heating purposes. One day Vinod went to Panchayat meeting in the village which is attended by all the village elders and requested them to instal 'Gobar gas plant' in the village and use cow-dung in it to produce gobar gas, instead of burning cow-dung cakes directly. He explained the advantages of using gobar gas as a fuel instead of cow-dung cakes. Every one liked the idea and thanked Vinod for guidance. (a) State two disadvantages of using dried cow-dung cakes as a fuel for cooking food. (b) State two advantages of using gobar gas as a fuel for cooking food. (c) What values are displayed by Vinod in this whole episode ?

Seeds are often grown in nurseries and then transplanted to the fields. What is the advantage of this?

Ayush starts walking from his house to office . Instead of going to the office directly , he goes to bank first , from there to his daughter 's school and then reaches the office. What is the extra distance travelled by Ayush in reaching his office ? (Assume that all distance covered are in straight lines ). If the house is situated at (2,4) bank at (5,8), school at (13,14) and office at (13,26) and coordinates are in km.