A two digit number is 2 more than 5 times the sum of its digits. If the digit in the tens place is lich
than the digit in the units place, find the number.
1.The speed of a river current is 3 km/h. A boat takes the same time to travel 15 km upstream as it does to travel 18 km downstream. Find the speed of the boat in still water.
2.The speed of the boat in calm water is 22 km/h. A boat takes the same time to travel 30 km upstream as it does to travel 50 km downstream. Find the speed of the river current.
3.The ratio of a two digit number to the number obtained by reversing its digits is 5:17. If the sum
its digits is 6, find the number.
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Step-by-step explanation:
1.let the no be 'x'
According to question
=x+2=5x
=x=5x-2
=x-5x=-2
=-4x=-2
=x=-2/-4
Simplfy - 2/-4
=-1/2
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