Self Maths Puzzle Numerical Ability Number System

(100-100)/(100-100)=2

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Self Other Question

At noon, ship A is 100km west of ship B. Ship A is sailing east at 35 km/hr and ship B is sailing north at 25km/hr. How fast is the distance between the ships changing at 4.00pm. DARPAN=306
DEVENDRA=204
BHUWANESH=721
DHERJ=?