Their captain Mithali Raj top-scored for the Asian side with 64 as they posted 205 for 8 off their 50 overs in the Super Six clash.

Opener Mona Meshram also hit a half century, scoring 55 off 85 balls.

South Africa were then bowled out for 156 in their reply with pace bowler Shikha Pandey picking up four wickets for 34.

India have three wins in the Super Six, with two victories carried over from the first group stage, but have still not confirmed their place in the top four, and a place at this year’s World Cup in England, due to hosts Sri Lanka beating Pakistan by five wickets.

But despite still not being assured of a place in the next round yet, Raj said India can feel comfortable going into their next two matches.

"The win today definitely eases the pressure on us, especially for the last match of the Super Sixes against Pakistan," she said.

"It also gives us time to assess what we are not doing right so that we can improve on those aspects in the coming matches."

Competition hosts Sri Lanka were set a target of 213 to reach for victory after Pakistan finished on 212 for 7, with Nahida Khan, 64, and Javeria Khan, 63, combining to add 119 for the second wicket.

However, a knock of 65 not out from Eshani Lokusiriyage helped steer the Sri Lankans to a win with 2.2 overs to spare.

In the day’s other Super Six match, Bangladesh secured a seven wicket success over Ireland.

The European nation were bowled out for 144 in 47.1 overs.

Bangladesh’s opener Sharmin Akhtar hit 52 for her side as they romped home with 10.5 overs remaining.

The next round of Super Six matches will take place on Friday (February 17).