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The present ages of father and son are in the ratio 7:2. If the father is 30 years older than the son, what is the son’s age?
A10 years
B12 years
C14 years
D16 years
By selling a watch for Rs. 450, a man loses 10%. At what price should he sell it to gain 20%?
ARs. 500
BRs. 550
CRs. 600
DRs. 650
What is the discount percentage if a book marked at Rs. 250 is sold for Rs. 200?
A15%
B20%
C25%
D30%
A boat travels 24 km downstream in 3 hours. If speed of stream is 2 km/h, what is speed of boat in still water?
A6 km/h
B8 km/h
C10 km/h
D12 km/h
A train 150 m long passes a telegraph post in 9 seconds. What is the speed of the train in km/h?
A50 km/h
B60 km/h
C72 km/h
D80 km/h
Find the perimeter of a square whose area is 144 cm².
A36 cm
B48 cm
C52 cm
D64 cm