Question

Why the cities of Mumbai and chennai are able see the noon sun exactly overhead twice a year but Delhi never see it exactly overhead ?explain.

Answer 1

It all happens bcoz of geographical location of these cities
Mumbai and Chennai lies close to equator so sun can come over head but Delhi is slightly away from equator, so sun is slightly tilted from being over head

Hope you got my point

Answer 2

mumbai and chennai are south of the tropic of cancer, while delihi is north of it. Due to the tilt of axis of rotation of the earth, parts of the earth north of the tropic of cancer will never have the noon sun exactly overhead. Parts to its  south will have the noonday sun exactly overhead twice a year, between the time of vernal equinox in march and autumnal equinox in september