[Excise and Taxation Inspector 2021]
1. A man in a train noticed that he can count 21 telephone posts in one minute. If they are known to be 50 metres apart, then at what speed (in km/hr) is the train travelling ?
55
57
60
63
2. If the simple interest for 6 years be equal to 30% of the principal, it will be equal to the principal after
10 years
20 years
22 years
30 years
3. A sum of money at compound interest doubles itself in 15 years. It will become eight times of itself in:
45 years
48 years
54 years
60 years
4. A circular road runs around a circular garden. If the difference between the circumference of the outer circle and the inner circle is 44 m, the width of the road (in m) is
3.5
4
7
7.5
5. A swimming pool 9 m wide a 12 m long 1 m deep on the shallow side and 4 m deep on the deeper side. Its volume (in m3) is :
208
270
360
408