১৯১৩১
Two numbers are in the ratio 3:5. If 9 is subtracted from each, the new numbers are in the ratio 12:23. The smaller number is:
উত্তর
33
১৯১৩২
A train 130 meters long passes a bridge in 21 seconds coming at 90 km/hr. Length of bridge is:
উত্তর
395 m
১৯১৩৩
A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find time taken by boat to go 68 km downstream.
উত্তর
4 hours
১৯১৩৫
The sum of the ages of a father and his son is 100 years now. 5 years ago, their ages were in ratio 2:1. Ratio of their ages after 10 years will be:
উত্তর
5:3
১৯১৩৮
The perimeter of a rectangle is 60 cm and its length is 18 cm. What is its breadth?
উত্তর
12 cm