गावनि फरायसा दिलिप देसायजों लिरफानाय रासायनिक जनत्र' बिद्दा बिगियानाव बिथांनि मोनसे मुंदांखा लेखा बिलायाव माब्रै खना दानखाव सिमाखौ आखानथिथाम आरो खेंख्रा नङा, सान्नानै लानानै साननायखौ गोरलै खालामनो हायो बेखौ कुमारा दिन्थिदों।
In one of his famous papers in Chemical Engineering Science, authored with his student Dilip Desai, Kumar showed how to simplify the calculations by assuming that the border cross-section is a triangle and not curved.