Steps: [2 Marks]
Result: [1 Mark]
Total runs scored by the team that lost = 310 - 10 = 300
Now, total no. of overs played by them = 50
i.e. in 30 overs, this team scored $=\frac{300}{2}$
=150 runs
The balance 300 - 150 = 150 runs were scored by this team in balance 20 overs.
By the given condition
In the next 5 overs $\frac{1}{2}$ of 150 runs
= 75 runs were scored.
$\Rightarrow$ 150 runs - 75 runs = 75 runs are still in balance.
Again in the next 8 overs.
$\frac{1}{5}$ of 75 = 15 runs were scored.
Now No. of overs left = 20 - (5 + 8)
=20 - 13
=7 overs
In seven overs, runs scored will be 75 - 15 = 60 runs