Roman covers 17 kilometer in 5 hours . How much time does he need to cover 10.2 kilometer ?

Arif incurred a loss of 25% by selling a used mobile phone set at taka 1500. How much could he gain/lose by se...

Rumi and Rony can finish a task, working together, in 12 days. If Rony alone can finish that in 20 days, how m...

The average age of 40 employees in a branch of a bank is 35 years . When a new employee joined the bank the av...

What should be added with 15480 to make it exactly divisible by 14 ?

In a two digit number, if it is known that its unit's digit exceeds its ten's digit by 2 and that product of t...

Two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km re...