Hani said she would do 3 more situps per minute than Diana would. Diana then did 40 situps at a rate of 4 situps per minute. Calculate the total number of situps they did together. Think carefully first, then make a decision:
Since Diana did 40 situps at a rate of 4 situps / minute, she did situps for 40 / 4 = 10 minutes. Hani had to do 3 + 4 = 7 situps per minute if Diana did 4 situps per minute. So over the 10 minutes Hani did 7 * 10 = 70 situps. Together, the total number of situps they did is 70 + 40 = 110. So, the answer is 110.