I am currently living in a plane area. I use an MTB (mountain bike). My work place is 10 to 15 km away from my home. Temperature is around 36 degree in celsius in my region.
Question : Is mountain bicycle good for this purpose?
Edit: See the image of mtb below. One more thing roads are straight but there are few up and downs in my ways.

(12*5 + 8.5)*25.4 = (60 + 8.5)*25.4 = 68.5*25.4 = 137*12.7 = (132^2 - 5^2)/10 = 1739.9mmAh, so you are 174cm tall (sorry, didn't feel like using a calculator ;-) ). While there are people who are taller, I guess that's still too tall for your saddle... – cmaster - reinstate monica Sep 13 '19 at 12:59