RRB Group-D Model Paper 20 with answers for online practice

Given:
Simple Interest (S.I) = 400
Principal, P = 4000
Rate of Interest, R = 6%
Formula used:
S.I = (P × R × T)/100
Calculation:
S.I = (P × R × T)/100
⇒ Period, T = (100 × S.I)/(P × R)
⇒ T = (100 × 400)/(4000 × 6)
⇒ 10/6 years
⇒ T = (10/6) × 12 months
∴ Period = 20 months