Capacitance of a parallel plate capacitor is proportional to area of its plates and inversely proportional to distance between the plates.
Between the plates of parallel plate capacitor of capacitance C, two parallel plates, of the same material and area same as per the plate of the original capacitor, are placed. If the thickness of these plates is equal to 15th of the distance between the plates of the original capacitor, then the capacitance of the new capacitor is